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Furuno CH-37 Radar Detector User Manual

1. 4 1 Selecting a 3D Display Either of two displays may be selected with the MODE control the frontal image at p position or the oblique image at c7 Example displays of both images are shown below Frontal image The frontal image picture gives a view of the bottom as if you are looking at it through a rearview mirror That is the most recent data appears at the front if the picture Heading Train indication Trackball data H range scale Vertical echoes real time echoes Figure 4 1 Frontal image 4 1 Oblique image The oblique image is the equivalent of the frontal image ro tated by 45 counterclockwise bo Sectional view Figure 4 2 Oblique image 4 2 Turning Vertical Echoes On Off Vertical echoes namely real time echoes can be turned on or off on the VERT ECHO OVERLAY field of the BOTTOM 3D menu which you can display by pressing the MENU key on the sub panel 2 SONAR KOINEI DUAL E S VERT ECHO OVERLAY OFF 3D VIEW SCALE DIST TIME SCALE t qu 1 2 or DISTANCE SCALE 500 1000 EXIT PRESS MENU KEY Figure 4 3 Bottom 3D menu 4 2 4 3 Changing 3D View Scale Mode and Scale Selection The depth z axis of the graph is displayed in either TIMe or DISTance scale mode The depth can be set to 500 or 1000 meters in the distance scale mode or 1 1 1 2 or 1 4 in the time scale mode The fraction means graph update number of trans mission 1 4 for example m
2. M JL ieee A J Figure 2 7 How to set the gain 2 6 Rejecting Sonar Interference and Noise While observing the sonar picture you may encounter occa sional or intermittent noise and interference as shown below These are mostly caused by onboard electronic equipment engine propeller noise or electrical noise from other sonars being operated nearby A Inteference from B Interference from other sonars marine life Figure 2 8 Noise and interference 2 7 Identifying noise source To eliminate noise effectively you should first identify the source as follows Operate all onboard equipment one by one while observing the picture e Run the boat at various speeds to check if the noise is speed dependent If neither of the above affects the picture turn on IR in the SONAR menu or adjust the NL Noise Limiter control as be low Rejecting noise with the interference rejector This control is effective in rejecting random noise and sea sur face reflections in rough sea conditions Pull the GAIN control and adjust it to eliminate only noise Reject the noise with IR in the SONAR menu Do not use an unnecessarily high setting since it many also reject small wanted echoes Rejecting noise with NL control Weak unwanted reflections colored light blue or green ap pear when water is contaminated or plankton layers or noise exist These echoes gradually become bluish as the NL control is turned clockwise
3. MENU SONAR DUAL E S TVG LEVEL l TVG TIME BEAM WIDTH NAR WIDE AUTO TRAIN SECTOR 90 180 VERT ECHO OVERLAY OFF 3D VIEW SCALE DIST TIME SCALE GA 1 2 or DISTANCE SCALE 500 1000 EXIT PRESS MENU KEY Figure 3 9 Bottom 3D menu Bottom 3D menu description TVG Level Controls the receiver sensitivity in short to me dium ranges to eliminate surface noise which may mask shal low targets TVG Time Determines the TVG effective depth BEAM WIDTH Sets the vertical beam width Select narrow for general use The wide beam width is useful for searching a wide area vertically but fish detection range is shortened since the transmitted power attenuates AUTO TRAIN SECTOR Sets the train sector 90 180 or 360 Use a wide sector to conduct a general search narrow ing it once a fish school is detected VERT ECHO OVERLAY Turns the E S combination display on off Requires external E S 3D VIEW SCALE Determines the depth item time or distance for 3D display mode Requires optional equipment TIME SCALE or DISTANCE SCALE Selects z axis scale of 3D picture 3 10 Interpreting the Display This section provides the information necessary for interpret ing the display How the picture is painted The sounding beam is emitted and the information target ech oes obtained by the beam appears in the corresponding sec tor as it appears on the sonar mode The difference is that the trainin
4. 3 5 TVG level amp time 3 Adjust the NL control if a large number of small blue dots appear on the screen Normally set it between 2 and 4 With the trackball marker measure the horizontal or vertical distance to a fish school or the bottom Reduce the output power if necessary Normally set it for maximum Or Q position C 100 100 10 E Pis Tni The FULL HALF key provides a quick change of the sector 120 or 1809 HUE E S DEGAUSS FAST TRACK V H AUTO SCAN RANGE TRAIN BOTTOM MODE Figure 3 1 Main panel and sub panel controls 3 1 3 2 Selecting Range The RANGE control selects the detection display range Se lect the range according to either the fish species being searched or the depth desired Normally it is set so that the bottom is traced at the lower part of the screen like an echo sounder Ry 60 Surface 60 PORT STBD 60 Horizontal range g Vertical range V H 1 1 Note The unit of range measurement can be changed through the SYSTEM menu For details see page 6 1 Figure 3 2 How to select range V H RANGE key The V H RANGE key changes the horizontal range scale in two steps See the figures below V H 1 1 V H 1 2 Figure 3 3 How the V H RANGE key works 3 3 Selecting Bearing for the Vertical Fan The TRAIN control determines the bearing of the vertical fan beam To which bearing the beam positions is known by the train indicator mark Train Indicator
5. A Only half of T6 A vertical beam width captures the bottom B Flat bottom Tilt angle 20 or more Bottom is displayed narrower and in stronger colors when compared to A C Sloping bottom Tilt angle 20 or more Shallow bottom is displayed in a strong color and with a short tail Bottom The deeper bottom echo is displayed in a weak color and with a long tail Figure 2 17 Bottom echoes 2 19 Fish schools A fish school appears as a mass of echoes on the screen The color of the mass shows the density of fish schools on the so nar beam To find distribution and center point of a fish school try several different tilt angles A Sea surface fish Tilt angle 5 to 10 Bottom echo not displayed because of narrow tilt angle Sea surface reflections are present Fish school Sea surface reflections B Midwater bottom fish Tilt angle 30 or more Fish echo which appears before bottom can be detected Fish school Large midwater fish school is present Tilt angle 0 to 20 Fish echo which appears together with or after bottom can be detected Fish school When the tilt angle is shallow he reflection echo from bottom is weak and the fish echo which appears from bottom is easy to find Figure 2 18 Fish schools 2 20 Sea surface reflections To reduce sea surface reflections set the tilt angle to 5 or higher so the upper edge of the
6. Operating procedure 1 Press the MENU key on the sub panel 2 2 Select the SONAR menu with the arrow keys on the sub panel 2 MENU ISONAR BOTTOM 3D DUAL E S TX RATE TX PULSE LENGTH SHORT TX OUTPUT POWER A C MAX TX EXT SYNC OFF IR OFF STABILIZER OFF COLOR 8 RES COLOR LINEAR SQUARE EXIT PRESS MENU KEY Figure 2 14 Sonar menu 3 Select item and setting with the arrow keys The selected item is highlighted and the current setting is circumscribed in white 4 To turn off the menu press the MENU key again Sonar menu description TX RATE Selects transmission repetition rate in ten steps 1 is the longest interval 10 the shortest Set to 10 for normal use TX PULSE LENGTH Selects Tx pulselength to LONG or SHORT The pulselength is adjusted automatically according to the range setting in LONG or SHORT position Set to LONG for normal use TX OUTPUT POWER Adjusts output power A is for mini mum power and C maximum Set to C for normal use and use a low power when sea surface reflections or bottom echo obscures fish schools 2 16 E S Menu TX EXT SYNC If two or more echo sounders or sonars are operated simultaneously mutual interference may result due to asynchronous keying pulse output To synchronize keying pulse turn TX EXT SYNC on IR Rejects interference Turn off when no interference exists otherwise weak echoes may be missed
7. STABILIZER Select ON when the Motion Sensor MS 100 option is connected COLOR Selects 16 or 8 color presentation RES COLOR Sets echo presentation characteristics LOG enhances weak echoes and is normally used LINEAR downplays the weak echoes comparing with LOG It is effec tive for suppressing the plankton layer SQUARE enhances the strong echoes comparing with LINEAR resulting in clear and easy reading picture 1 Press the MENU key 2 Select E S at the top of the screen MENU RANGE SONAR BOTTOM 3D DUAL E S 80 160 240 320 SHIFT 0 GAIN 50 N L 0 IR OFF ON ADVANCE SPEED 1 1 1 2 RES COLOR EXIT PRESS MENU KEY LINEAR Default settings circumscribed Figure 2 15 E S menu Table 2 1 E S menu description em Bem ouppresses interfernce from sonar of other ship or noise from electrical machinery onboard own ship ADVANCE SPEED Selects picture advance speed The fractions the number of scan lines produced per transmission oelect LOG or LINEAR according to amplifier of echo sounder RES COLOR LINEAR FCV 382 782 271 LOG FCV 291 292 1000 2 17 Turning Trackline Plotting On Off With navigation data input the CH 37 can plot ship s track on the sonar mode display The track itself can be turned on off with the TRACK key 2 17 2 18 Interpreting the Display 2 18 This section provides the information necessary for interpret ing the display How
8. Usually a setting from 3 to 4 provides suf ficient reduction Rejecting interference with Tx rate When other sonars are operating nearby at the same trans mission interval as that of own ship s sonar interference caused by other sonars appears To reduce the interference reduce the Tx rate setting on the SONAR menu Note When the sonar is used in shallow water with the range set between 100 m and 200 m and the Tx rate at 10 bottom reflections caused by the transmission which is the last but one appear on near on screen Reduce the Tx rate to 7 or 8 to reject them 2 Detecting Fish Schools Aurally Occasionally you will be preoccupied with other tasks and un able to concentrate on watching the sonar picture In such cases it would be a good choice to use the audio function This func tion enables you to monitor echoes from fish schools and bot tom through the external speaker option of which the volume can be adjusted with the AUDIO control on the sub panel 1 After you become accustomed to utilizing the audio function you should be able to detect a fish school from a range longer than you can detect it on the screen In addition you may judge whether the fish schools is approaching or going away the tone becomes higher when the fish is approaching and lower when going away 2 8 R B and Event Markers trackball operation 2 10 The trackball functions to obtain the data slant amp horizontal range depth and beari
9. reset the power Range shift e s 1 2 RANGE 1 Select RANGE SHIFT E S from the SYSTEM menu Press the MENU key RANGE SHIFT E S 2 MO MO 1 2 3 4 9 FACTORY SETTING YES EXIT PRESS MENU KEY Figure 6 6 Range shift e s screen 3 Select range shift 4 5 6 Set range shift To return to the SYSTEM menu press the MENU key To quit reset the power Color setting The color setting screen allows you to adjust display colors 1 Select COLOR from the SYSTEM menu 2 Press the MENU key COLOR LEVEL 19 F 14 13 12 M Ll HUE1 TEXT AQ BKGD NJ MENUSI HUE2 TEXT AQ BKGD B MENU HUE 3 TEXT AQ 11 BKGD X 0 MENU X 0 B 0 0 0 0 0 0 0 0 0 0 cO 11 12 12 12 Tooo NO AOON FACTORY SETTING YES EXIT PRESS MENU KEY Figure 6 7 Color setting screen Select color 3 4 Set color 5 To return to the SYSTEM menu press the MENU key 6 To quit reset the power Factory setting menu restoring default settings 1 Select DEFAULT from the SYSTEM menu 2 Press the MENU key DEFAULT ARE YOU SURE IN ves EXIT PRESS MENU KEY NOTE ALL SETTINGS INCLUDED IN SYSTEM MENU WILL BE CHANGED TO FACTORY SETTING Figure 6 8 Default screen 3 Select YES and press the MENU key to restore default set tings 4 To return to the SYSTEM menu press the MENU
10. to obtain square picture BRIGHTNESS Adjust CRT brilliance brighter dimmer 5 To return to the SYSTEM menu press the MENU key 6 3 System Menu Press the MENU key while turning on the power The SYSTEM menu appears SYSTEM MENU SYSTEM SETTING RANGE SONAR MODE RANGE VERTICAL FAN MODE RANGE SHIFT E S COLOR LANGUAGE DISPLAY TEST1 ROM RAM KEY TRAIN TILT TEST SCREEN ADJUSTMENT TEST PATTERN DISPLAY TEST2 OPERATION DEFAULT EXIT TURN OFF THE UNIT Figure 6 3 System menu Range sonar mode menu 1 Select RANGE SONAR MODE from the SYSTEM menu 2 Press the MENU key Oo ND OF O N RANGE SONAR MODE 0 C1 O1 NO O O ook ah NO O c 60 FACTORY SETTING YES EXIT PRESS MENU KEY Figure 6 4 Range sonar mode menu 6 4 Er XE re Xe Select range oet range To return to the SYSTEM menu press the MENU key To quit reset the power Range vertical fan mode l 1 2 3 4 5 6 ri 8 oelect RANGE VERTICAL FAN MODE from the SYSTEM menu Press the MENU key RANGE VERTICAL FAN MODE 0 NO RO lir I S NO 00 B ITO Ik O SO 1D IO J IO ID ITO CO N 8 FACTORY SETTING YES EXIT PRESS MENU KEY Figure 6 5 Range vertical fan mode menu Select range 3 4 5 6 Set range To return to the SYSTEM menu press the MENU key To guit
11. 3 1 Nertical Fan Mode INGICATIONS 2 o oo o o o om Wo m mb mmm satu 3 12 3 12 How to Use the Vertical Fan Mode oo oooWo Wo oom Woo mann 3 13 3D MODE 4 1 Seleciing a 3D DISpIAY ET 4 1 4 2 Turning Vertical Echoes On Off mmm timnas DUE 4 2 4 3 Changing 3D View Scale Mode and Scale Selection ooooooWoW oo 4 3 d qne Oa ON ota ee AN 4 3 CUSTOM MODE KEYS 1 2 3 5 T Aboutihie Custom Mode KEYS c2 2 20 0990 82 0 08 90 0 00 80 us bite gan 5 1 5 GUStoMmIiZINg Me KEY Ss 5 1 5 3 Custom Mode Operation oo oo Wo Wo Wo WWW mna 5 2 MENU SETTINGS Od System Setting MENU sxistecctetecedeteculsteertetesudoternienienlouioulouleuioiouleuiocioalectouinelertusloeieiedend 6 1 622 GcreenAdIUSITTe Es ee a cte ata eta adat 6 2 ons iU MM T MP 6 4 o HUS IVO ui saucia bdo asiste ee nee ee rere ee ene ene ee a eget 6 9 MAINTENANCE amp TROUBLESHOOTING 7 1 Maintenance of Display Unit ooWooW oo Woo Wan 7 1 7 2 Maintenance or Transceiver UNI issued mainan aah anal ea 7 1 Teo M i tenanc ot mS ERE E UU eee em eae EE ee ee ee ee 7 2 l4 Display UNIt TOST UPPER 7 3 Ve a LS e OS rene T T ES 7 5 PAN Sa Le Naa NP mE 7 6 T ETOESIVOSSOddBS eee ee PNE UMP Drm ee MM ete te a 7 6 1 8 Tro blesnootirig Table o edid ead me A epu Doe tese ae Sal eb BLN 7 9 CUSTOM MODE KEY LABELS nona AP 1 SPECIFICATION
12. FURUNO OPERATOR S MANUAL COLOR SECTOR SCANNING SONAR MODEL CH 37 p FURUNO ELECTRIC CO LTD NISHINOMIYA JAPAN FURUNO ELECTRIC CO LTD Your Local Agent Dealer 9 52 Ashihara cho Nishinomiya Japan Telephone 0798 65 2111 Telefax 0798 65 4200 All rights reserved m E Printed in Japan FIRST EDITION JUL 1998 MAY 17 2002 MUN NN WN TENI CH 37 00080821101 OME13030E00 AN SAFETY INSTRUCTIONS A WARNING ELECTRICAL SHOCK HAZARD Do not open the equipment Only qualified personnel should work inside the equipment Immediately turn off the power at the switchboard if water leaks into the equipment or something is dropped in the equipment Continued use of the equipment can cause fire or electrical shock Contact a FURUNO agent for service Do not disassemble or modify the equipment Fire electrical shock or serious injury can result Do not place liquid filled containers on the top of the equipment Fire or electrical shock can result if a liquid spills into the equipment Immediately turn off the power at the switchboard if the equipment is emitting smoke or fire Continued use of the equipment can cause fire or electrical shock Contact a FURUNO agent for service Make sure no rain or water splash leaks into the equipment Fire or electrical shock can result if water leaks in the equipment A WARNING Keep heater away from equipment A heater can mel
13. SYSTEM SETTING and press the MENU key 3 Select items with up and down arrow keys options with left and right arrow keys 4 Press the MENU key to return to the system menu Note Be sure to return to the system menu before turning off the power to properly register settings 5 To return to normal operation reset the power See the next page for SYSTEM SETTING menu description 3D DISPLAY SHIP S POSITION CURRENT DATA HEADING DISPLAY NORTH MARK TRACK HDG SPD DATA NAV DATA DATA FORMAT FOR NAV2 CIF BAUD RATE TVG CORRECTION UNIT V MODE MANUAL TRAIN DEGAUSSING INTERVAL FACTORY SETTING Table 6 1 System setting menu description Turns 3D display on off Turns position indication on off and selects position format latitude and longitude or Loran LOP Turns current tide data display method flow from flow to or off Turns heading indication on off and selects its format true or azimuth Turns north marker on off Selects length of courseline plotting 10R ten times the range in use or 20R twenty times the range in use Selects source of data to be used to plot courseline NAV Navigator CI Current Indicator Selects source of position data GPS LORAN C LORAN A DR DECCA OTHERS Selects data format for nav data CIF FURUNO or NMEA Selects baud rate of CIF data 1200 2400 4800 bps Changes TVG curve to compensate for absorption attenuation of ultrasonic wave in
14. TX PULSE LENGTH TX OUTPUT POWER TX EXT SYNC IR STABILIZER COLOR RES COLOR TVG LEVEL TVG TIME BEAM WIDTH AUTO TRAIN SECTOR VERT ECHO OVERLAY 3D VIEW SCALE TIME SCALE DUAL MODE NET MOUTH SHIFT NET MOUTH WIDTH NET MOUTH HEIGHT NET DEPTH HOR SCAN RATE VERSCAN RATE RANGE SHIFT GAIN N L IR ADVANCE SPEED RES COLOR TT TTT SYSTEM SETTING RANGE SONAR MODE RANGE VERTICAL FAN MODE RANGE SHIFT E S COLOR LANGUAGE DISPLAY TEST1 ROM RAM KEY TRAIN TILT TEST SCREEN ADJUSTMENT TEST PATTERN DISPLAY TEST2 OPERATION DEFAULT vil 3D DISPLAY SHIP S POSITION CURRENT DATA DEPTH DATA HEADING INDICATION NORTH MARK TRACK HDG SPD DATA NAV DATA DATA FORMAT FOR NAV2 CIF BAUD RATE TVG CORRECTION UNIT V MODEL MANUAL TRAIN DEGAUSSING INTERVAL FACTORY SETTING This page is intentionally left blank OPERATIONAL OVERVIEW 1 1 Control Description Main panel 13 Co L3 ILE ak TRANSDUCER 60 MODE RANGE CUSTOM MODE CH 37 Switches on and off the entire system Controls the transducer Each switch functions as follows 4 Raises the transducer iL Lowers the transducer Selects display mode from left hand position Normal Sonar Mode or Normal Sonar Mode E S Combination Expanded Sonar Mode Vertical Fan Mode or Vertical Fan Mode E S Combination 3D Display front perspective view 3D Display slant perspective view Opt
15. e Selection of frequencies 60 81 113 162 kHz rackball offers easy to use operation for marker settings e Quick training and quick raise lower operation e Vertical mode presents a vertical section of underwater con ditions 3D mode shows vertical echoes like a graphic track plotter SYSTEM CONFIGURATION OPTIONAL SUPPLY STANDARD SUPPLY DISPLAY UNIT LOUDSPEAKER SC 05WR CH 370 E REMOTE CONTROL BOX CH 343 E S INTERFACE UNIT VI 1100A External Interface Na a OP06 13 SA 0288040 6M Buin CH 341 gt henaa i External EXTERNAL Interface MONITOR OP06 14 HULL UNIT MOTION Clinormeter Built in CH 342 SENSOR Or BS 704 vvvv MS 100 SZ E 506 6 10 0654067 15 30 50M __ 250V DPYCYS 2 NOTE 2 RECTIFIER NOTE 1 RU 17468 2 3 250V DPYCYS 2 TT Q1 250VDPYCYS 2 cae Oa i 20VDPYCYS2 _ no Mm Connector to fitted at installation e n a Connector fitted at factory SHIP S MAINS haa 100 115v 200 230V AC CON Crimp on lug to be fitted at installation NOTE 1 Two sets of rectifiers are necessary for AC mains NOTE 2 DC ship s mains only For AC ship s mains the power is supplied directly from the rectifier unit to the trans ceiver unit vi MENU TREE SONAR MENU key BOTTOM 3D DUAL E S PWR key MENU key SYSTEM MENU Tri TTT mm TX RATE
16. speed of 18 knots during operation and 15 knots while raising lowering transducer to prevent damage to the transducer 1 5 Presentation Mode Five presentation modes are available with the MODE control Normal sonar Normal sonar combination Expanded sonar Vertical fan mode or Vertical fan mode combination and 3D display mode front and slant perspective views Presentation Normal sonar mode Normal full circle picture appears on the entire screen Normal sonar E S vertical fan or sonar Normal full circle picture appears at the upper 2 3 of the screen the echo sounder vertical fan or sonar on the lower 1 3 To select the picture to display in the lower 1 3 see DUAL MODE on page 6 9 Echo sounder required to display echo sounder picture Expanded sonar mode Zoomed picture appears on the entire screen The echo size on the screen is expanded 1 5 times Continued on next page Vertical fan mode A vertical section of underwater conditions half circle area appears on the entire screen Vertical fan mode E S or sonar A vertical section of underwater conditions half circle area appears on the upper 2 3 and echo sounder or sonar picture on the lower 1 3 To select the picture to display in the lower 1 3 see DUAL MODE or page 6 9 Echo sounder required to display echo sounder picture 3D display front perspective view The vertical contour line appears historically time o
17. 14 Audio Monitor 12 steps during 30 m to 1600 m 12 steps during 10 m to 800 m 5 steps during 10 m to 800 m 1000 m max 4 point at Expand mode according to the train setting 2 point at Slice mode according to the tilt setting Level 100 dB max Range 1000 m max Variable Hue control Correlation with before data 2 W 4 ohms using external speaker SC 05WR option Optional external E S interface is required 3 TRANSCEIVER 1 Frequency 2 Output Power 3 Beamwidth 4 Pulselength 4 HULL UNIT 1 Train Step 2 Tilting Horizontal mode Vertical Fan Mode 3 Transducer Travel 4 Raise Lower Time 5 Allowable Ship s Speed 60 162 kHz selected by internal settings 0 8 kW 60 kHz 1 5 kW 162 kHz 6 dB 0 2 to 10 6 ms varied according to the range in use selected on the Menu 45 step by fast scan mode or 6 step by normal mode Tilt Range 5 to 90 Tilt Step 1 step Tilt Range 0 to 180 Tilt Step 6 fast scan or 3 normal 400 mm 10 sec approx 24 32 VDC 18 knots or less 15 knots during raise lower operation 5 POWER SUPPLY AND CONSUMPTION 1 Display Unit 2 Transceiver Unit 3 Hull Unit 24 32 VDC 20 to 41 6VDC 140 W approx or 100 110 200 220 VAC 50 60 Hz 1 24 32 VDC 20 to 40 VDC 50 W approx or 100 110 200 220 V AC 50 60 Hz 1 24 32V DC 50 W approx 150 W while traveling AC spec set requires rectifier RU 1746B 2 SP 2 6 ENVIR
18. Bottom and Sea Surface Reflections in Shallow Fishing Grounds In shallow fishing grounds excessive sea surface and bottom reflections often interfere with wanted fish echoes and they can not be eliminated sufficiently with the aforementioned TVG con trols In such cases try to reduce the output power from C to B or Aon the SONAR menu without turning down the gain The picture becomes clearer when output power is reduced rather than when the gain is decreased as illustrated below O 0 DIMMER BRILL HUE FAST CAN DD E S DEGAUSS MES Em Ae 15315 TRACKN V H AUTO RANGE TRAIN BOTTOM MODE MENU ISONAR BOTTOM 3D E S ELS TX RATE Le le TX PULSE LENGTH LONG SHORT MENU TX OUTPUT POWER A B C MAX A Figure 2 10 How to reduce bottom and surface reflections by reducing Tx output power 2 11 Suppressing Bottom Tail As described earlier fish schools near the bottom are some times difficult to detect because you have to discriminate fish echoes from the bottom reflections To discriminate fish echoes near the bottom select the short Tx pulse length on the SONAR menu to decrease the tail of bottom reflection 2 12 Displaying Surface Fish Clearly TVG adjustment Echoes from targets such as the bottom or a fish return to the transducer in order of the distance to them and when their in tensities are compared atthe transducer face those from nearer targets are generally stronger when their reflecting
19. Mark Training of Vertical Fan Beam Bow Bow n The training of the fan beam depends on the status of the AUTO TRAIN key in the sub panel 2 AUTO TRAIN Example on Auto Train Sector 90 The beam LED lights trains auto Lu 3 matically with Pu in the selected range cen tered at the bearing set by the TRAIN control M NNI Zr o gs AUTO TRAIN off Manual train LED goes off The TRAIN control can rotate the fan Manual train range can beam to any bearing be selected either HALF desired See V MODE 174 or FULL 360 MANUAL TRAIN on on the SYSTEM menu Page 6 2 3 3 3 4 Selecting the Display Sector Sector center width The SECTOR and the TILT controls determine the display area sector width and the display center sector center respec tively Mod Display Sector transducer tilting sector Vertical Fan Mode 36 60 96 120 156 180 Selected by FULL HALF key PORT 9 sTBD D 9 Display sector Shaded area 180 ARA Sector center Figure 3 4 Selecting the display sector Sector step The FAST SCAN key in the sub panel 2 selects sector step in 6 or 3 3 5 Automatic Shifting of Own Ship Position Own ship position on the screen is shifted automatically either rightward or leftward according to the direction of the sector center and the display sector width The figure below shows the own ship position has been shifted rightw
20. NU KEY Figure 7 3 Display unit test results 7 5 Train Tilt Test This test checks the transducer training and tilting functions for proper operation 1 Turn on the power while pressing and holding down the MENU key 2 Select TRAIN TILT TEST with the arrow keys in the sub panel 2 3 Press the MENU key to start the test 4 To return to the SYSTEM menu press the MENU key again 5 To quit reset the power TRAIN TILT TEST PHOTO SENSOR CHECK TRAIN TILT This checks the photo sen 0 OK 10 OK sors which detect the refer 180 OK 90 OK ence angles for training 190 OK and tilting operations TRAIN CHECK This checks the transducer training operation The four digit figures show the num ber of pulses used to train the transducer by 180 If training is abnormal NG No Good count increases TILT CHECK by one PULSES 10 90 1206 This checks the transducer 90 190 939 tilting operation If the num 190 90 919 ber of pulses used to tilt the 90 410 1225 transducer is abnormal NG count increases by one TEST COUNT EXIT PRESS MENU KEY Figure 7 4 Train tilt test results 7 5 7 6 Test Pattern Position check This test checks display position and colors 1 Turn on the power while pressing and holding down the MENU key 2 Select TEST PATTERN with the arrow keys in the sub panel 2 Press the MENU key to start the test BLACK IR GREEN BLUE F
21. ONMENTAL CONDITION 1 Ambient Temperature 0 C to 50 C 2 Relative Humidity 95 or less at 40 C 7 CORTING COLOR 1 Display Unit Chassis 2 5GY5 1 5 Panel N 3 0 2 Hull Unit 2 5GY5 1 5 3 Transceiver Unit 2 5G7 2 SP 3 INDEX 1 2 3 keys custom mode keys 5 1 5 2 3D mode 4 1 4 3 3D view scale time distance 4 3 A AUDIO control 2 9 AUTO TRAIN key 3 3 Auto train sector vertical fan mode 3 8 B Background color 1 6 Beamwidth vertical fan mode 3 8 Bottom 3D menu 3 8 BRILL control 1 3 C Color adjustment 6 7 Color quantity 2 16 Custom mode key labels AP 1 Custom mode keys UJ 2 3 5 1 5 2 D Default menu settings 8 9 DEGAUSS key 1 6 DIMMER control 1 3 Display unit care 7 1 Display unit test operation 6 8 ROM RAM keyboard 7 3 E E S key 1 2 1 5 E S menu 2 17 Echo resolution Sonar mode 2 16 E S mode 2 18 ENTER key 1 2 5 1 Error messages 7 6 7 8 EVENT key sonar mode 2 10 vertical fan mode 3 6 Event marker sonar mode 2 10 vertical fan mode 3 6 F FAST SCAN key sonar mode 2 3 vertical fan mode 3 4 FULL HALF key 2 11 G GAIN control 2 7 H Horizontal marker 3 6 HUE key 1 6 Hull unit care 7 2 Indications sonar mode 2 24 2 25 vertical fan mode 3 12 IR control sonar mode 2 8 vertical fan mode 3 5 K Keying pulse synchronization 2 17 M Main panel description 1 1 Maintenance Display unit 7 1 Hull unit 7 2 Transceiver unit 7 1 M
22. S 1 nennen SP 1 INDEX Index 1 FOREWORD Features Congratulations on your choice of the FURUNO CH 37 Color Sector Scanning Sonar We are confident that you will enjoy many years of trouble free operation with this fine piece of equip ment For over 40 years FURUNO Electric Company has enjoyed an enviable reputation for quality and reliability throughout the world This dedication to excellence is furthered by our exten sive global network of agents and dealers The CH 37 is the newest addition to FURUNO s CH family of sonars This new sonar is especially designed to provide faster detection capability by sector scanning method and improved operation by rotary controls and trackball The sonar picture is presented in 16 or 8 colors on a high resolution CRT The ex cellent signal processing technique and improved receiver bring you a clear and high quality picture on a 15 inch screen We would appreciate feedback from you the end user about whether we are achieving our purpose Thank you for considering and purchasing FURUNO equip ment e Multi sector scanning provides quick coverage of full 360 area in just 8 transmissions PPl operation can be selected for superior detection range and bottom fish sounding e Custom mode keys provide desired sonar settings by one key stroke e Selectable background color lessens eye fatigue in both daytime and nighttime operations
23. adjusted BRILL control set too low Increase the brightness Continued on next page TX OUTPUT POWER A B Oo Oo Cae 2 POWER CABLE VS SHIELD MENU TX RATE ISONAR BOTTOM 3D E S 10 TX PULSE LENGTH LONG SHORT C MAX KA N 7 9 Color partially irregular Magnet is near the screen This symptom occurs if equipment which contains a magnet loudes peaker etc is placed near the screen Check to see if the degaus sing circuit is turned off on the SYS TEM SETTING menu See page 6 2 Note If not cleared consult with electronics technician Picture distorted Equipment generating strong mag netic field is near display unit Locate magnetic field generating equipment rectifier etc well away from the display unit Picture contains noise Equipment not grounded properly Display Unit Transceiver Carefully check the ground Unit o Power cable is run alongside the signal cable Signal cable may pick up noise emit ted from power cable of other equip ment therefore separate them from each other X gi Power cable Debris may be on sea surface EA of other set Reject unwanted echoes with the lt interference rejector on the SONAR 2 c Separate menu TVG control or NL control A3 physically 7 10 CUSTOM MODE KEY LABELS FRONT BACK FISHING GROUND FISHING GROUND Cut out label record settings on label fold in half and insert in label case N Fol
24. ard on the screen to provide the wider view at port side Display sector Sector center Figure 3 5 Automatic shift function 3 6 Rejecting Sonar Interference and Noise While observing the picture you may encounter occasional or intermittent noise and interference as shown below This is mostly caused by onboard electronic equipment engine pro peller noise or electrical noise from other sonars being oper ated nearby Turn on the interference rejector IR in the SONAR menu to reduce or eliminate the interference Figure 3 6 Interference and noise 3 Horizontal Vertical and Event Markers trackball operation The trackball functions to obtain the data horizontal range and depth from own ship to the specified position on the screen and combined with the R B and EVENT keys switches the Horizontal Vertical and Event markers on off Event 1 Position the trackball marker on the desired location marker Event marker Echo display area 2 Press the EVENT key 3 To erase the marker place the trackball marker outside the echo display area and press the EVENT key Note CH 37 stores one event marker Horizontal and Vertical markers Vertical marker Horizontal marker Distance to the intersection of the markers 1 Position the trackball marker on the desired location 2 Press the R B key The horizontal and vertical markers appear and the distance to the intersection of the mark ers is indicate
25. ay with the DEGAUSS key when picture color is abnormal 7 2 Maintenance of Transceiver Unit Keep the unit clean especially the cable entrance Wipe off dust or oil with a cloth dampened in water diluted mild deter gent 7 3 Maintenance of Hull Unit Lubrication Grease the raise lower screw shaft once a year Also grease the raise lower main shaft upper part of the grease cotton re tainer twice a year These parts can accessed by removing the raise lower drive assembly cover Manual raise lower of transducer with hand crank Ship s mains should be supplied to the hull unit to do this check Also be sure to press and hold down the brake off switch while manually raising lowering the transducer Failure to press the switch may damage the raise lower motor jn 2 3 Turn off the breaker on the hull unit Hemove the brake off switch cover oet 19 mm socket wrench and turn it while pressing the brake off switch Check that the transducer can be raised lowered smoothly with a constant force from the upper to the lower limit posi tions If not centers of the main body flange and the retrac tion tank are not aligned Adjust the hull unit mounting position Brake Off Raise switch DS Mr A ey owe az Breaker Figure 7 1 Using the hand crank 7 4 Display Unit Test This test checks the ROM RAM and keyboard for proper op eration l Turn on the power while pressing and holding down the MENU ke
26. b Fish school b Fish school A Case 1 Figure 2 4 Fish echo and tilt angle Points to consider e Normally a vertically distributed fish school is a better sonar target than the bottom because it reflects the transmitted pulse back toward the transducer Incase 3 both fish schools 3 and b are presented Gener ally speaking however midwater fish schools tend to be larger than bottom fish schools and they are often displayed near the bottom on the display e It is difficult to detect bottom fish when they are not distrib uted vertically Tilt angle for surface fish Sound emitted from the sonar transducer forms an oval shaped beam with a width of approximately 13 for 60 kHz transducer in the vertical direction vertical beam width The tilt angle is indicated by the angle between the center line of the beam and the horizontal plane Then if the tilt angle is set to 0 the cen ter line is parallel with the sea surface and one half of the emit ted sound goes upward toward the sea surface This causes one half of the emitted sound to be reflected to ward the transducer and displayed on the screen as sea sur face reflections When the sea is calm since the sound is reflected just like a light hitting a mirror at a narrow incident angle it propagates away and the sea surface reflections be come negligible 2 5 2 6 er However if the sea is not calm enough they will become domi nant an
27. bout 15 minutes Consult a physician e f the oil contacts skin wash with soap and water e f the oil is ingested see a physician immediately Disposal of oil and its container Dispose of oil and its container in accord ance with local regulations For further details contact place of purchase Storage oeal container to keep out foreign material Store in dark place TABLE OF CONTENTS FOREWORD ttti v SYSTEM CONFIGURATION nnn vi lsil0NI GH vii OPERATIONAL OVERVIEW UP OM OS SCIPIO Nae ace TT 1 1 1 2 UGE MA the Power OMOT ena onencieaeseceseanieaeesnanedseaakiueawatvenassaceetaceanee 1 3 1 3 Adjusting Screen Brilliance Panel Backlighting oooWoW Woo WK 1 3 1 4 Lowering the Transducer ee ia at an an ons dac 1 3 ho i e MO en 1 4 10 BACKING OOOI p M 1 6 1 7 Degaussing the SOTEN been EE EO OO 1 6 SONAR MODE 2 1 Typical Operating F HOGOOOU ee Ata bina 2 1 2 2 OS CLIO HTC ar niet Sit 2 2 2 9 Selecting Sector Sector Stepping sean ente etie tui eI HU n enu uda oe nta te eund 2 3 2 4 Setting the I2 Too ERROR 2 4 2 ONS IN CI a RETO 2 7 2 6 Rejecting Sonar Interference and Noise oooo WWW W oom WWW mm 2 7 2 1 Detecting Fish Schools Akal ser Santan ee dunt ce tuta ua as Ee DADO 2 9 2 8 R B and Event Markers trackball operation o oooW Woo Woo WWW mk 2 10 2 9 Selecting Training Sector Quickl
28. d at the bottom left hand side of the screen 3 To erase the marker place the marker outside the echo display area and press the R B key Requires navigation data Continued on next page 3 6 Function Procedure Purpose Trackball Trackball data Horizontal Range Data A Depth Trackball marker 1 Position the trackball marker on the desired location 2 Read the trackball data displayed at the upper left corner of the screen 3 8 Applying Proper TVG The TVG function is the same as the one explained in the so nar mode For best results set both TVG level and time a little lower than the ones in the sonar mode The setting is mode on the BOTTOM 3D menu screen and the usual setting for both time and level is 3 MENU SONAR BOTTOM 3D DUAL E S TVG LEVEL 3 0 le TVG TIME 3 0 BEAM WIDTH NAR LGA 7N Figure 3 7 Bottom 3D menu screen TVG level rejects surface noise which may mask shallow tar gets and TVG time adjusts the effective depth Level too low Proper Level too high Time to high Figure 3 8 Examples of proper and improper TVG 3 7 3 9 Bottom 3D Menu Operation Basic procedure 1 Press the MENU key on the sub panel 2 2 Select BOTTOM 3D with the arrow keys in the sub panel 2 3 Select item and setting with the arrow keys The selected item is highlighted and the current setting is circumscribed in white 4 To return to the BOTTOM 3D menu press the menu key again
29. d here FISHING GROUND FISHING GROUND FISHING GROUND FISHING GROUND FISHING GROUND FISHING GROUND FISHING GROUND AP 1 SPECIFICATIONS OF COLOR SECTOR SCANNING SONAR CH 37 1 GENERAL 1 Display System PPI display on high resolution 15 381mm color CRT 2 Picture Color 16 or 8 color depending on signal strength 3 Display Mode 1 Normal sonar mode display 2 Expanded sonar mode display 3 Vertical fan mode display 4 3D mode display front view 5 3D mode display slant view E S combination display is optionally available in modes 1 and 3 Optional external E S interface is required 4 Range Train Speed Sk kHz 1GkHz kHz CENE 360 Se ee 4 om om sa 5 oo 0250 60 Ce exe exe er s ese ew s6 A p on d n oo 12 0 a e oso 20 Measured at fast train mode of 60 kHz reference only Display sector width is selected among 45 90 135 180 225 and 360 by horizontal 36 60 96 120 156 and 180 by vertical 2 DISPLAY UNIT 1 2 3 4 5 Display System PPI display on high resolution 15 381mm color CRT Color Hue Control LOG linear square Contrast Variable Display Mode Vertical Mode Slice Mode 3D Mode Unit Indication m ft fa SP 1 6 Horizontal Range 7 Vertical Range 8 E S Range 9 E S Shift 10 Offcenter 11 TVG 12 Clutter 13 Elimination Interference
30. d interfere with observation of wanted echoes To mini mize these sea surface reflections and to search surface fish schools effectively the tilt angle is usually set between 5 and 6 so the upper portion of the beam becomes almost parallel with the sea surface When the sea is rough it is often set toa little larger angle Sea surface 11 Sea surface R400 Tilt UE angle 11 Figure 2 5 Tilt angle and sea surface reflections Tilt angle 0 Tilt angle 5 7 Suitable tilt angle The figure below illustrates the relationship among tilt angle depth and detection range Refer to it to find out the suitable tilt angle for a given depth detection range DSS Lu REE AAA SAX a i EE sis pL PALE PRAT A17 Lee A A T E Figure 2 6 Tilt angle and beam coverage 2 5 Adjusting Gain Most equipment malfunctioning claims result from improper setting of switches and controls For example fish fish habitat or outcrop can not be readily detected by merely increasing the gain Initially set the gain between 3 and 5 with the GAIN control Then fine tune depending on the fishing ground fre quency used etc R Turn GAIN control clockwise Few fish found ARN o gt Adjust NL control TRA of or difficult to find fish zs Adjust TVG controls habitat S p EN e e 1 ad i ij 1 NS E fh N HD PA CLEAR PICTURE E DO0N Hu m t Bill D Turn on IR in SONAR menu w ty
31. e when passing over fish schools Display of net hauling This is an example of net hauling display The location of the net is indicated clearly Ship is stopped Backward Own ship Figure 3 13 Net hauling and sonar picture False echo In a shallow water less than 100 m detection unwanted ech oes shown in the figure may appear This phenomenon is caused by the false echo from the previous transmission Re ducing the Tx rate on the BOTTOM 3D menu may lessen this effect False echo Figure 3 14 False echoes TIP Training indicator and screen display N Starboard port Fore aft Aft fore C gt d gt PORT Soon im rore FORE AFT LY LJ LJ e Shows starting position of the sounding beam S P 3 11 3 11 Vertical Fan Mode Indications Heading Train indicator Trackball T R gt 40 H Range data Dv ue v 80 V Range H Range Net mouth scale mark Fish schools Trackball Bottom EN g OE ge 2nd reflection 80 V Range scale jocum dci POR 2 D 15 i 34 43 26N Ee 135 20 28E Vertical Horizontal marker data Figure 3 15 Indications in the vertical fan mode 3 12 3 12 How to Use the Vertical Fan Mode 1 TRAWLER Surface Mid water Bottom Usage Fish school detection i Bottom shape discrimination Relation between fish school and fishing gear 1 Turn on the AUTO TRAIN key on the sub panel 2 and set the Auto train direction of the
32. eans the graph is updated every four transmissions These selections are made on the 3D VIEW SCALE and TIME SCALE or DISTANCE SCALE lines of the BOTTOM 3D menu The time mode should be selected when speed data is not being fed to the unit from navaids or speed log I Depth Frontal image Oblique image Figure 4 4 Depth dimension in frontal and oblique images 4 4 Other Operations The following operations are the same as those in the Vertical Fan mode e Range Selection e Rejecting Sonar Interference and Noise e Horizontal Vertical and Event markers VG Adjustment e Beam Width Selection The selection of the bearing of the vertical fan beam and auto train function are disabled as the bearing of the vertical fan beam is automatically selected to 90 in this mode This page is intentionally left blank CUSTOM MODE KEYS u3 2 13 5 1 About the Custom Mode Keys Like the redial feature on a telephone the custom mode keys record control settings and play them back in a single key stroke This feature is useful when you need to quickly set up the so nar according to fishing ground or fish species being searched You can program three sets of settings for the MODE RANGE SECTOR TRAIN and TILT controls 5 2 Customizing the Keys 1 Tune the sonar as you normally would 2 Pressthe ENTER key to display the CUSTOM MODE menu 3 Press one of 1 2 or 3 key contents shown in second column from the
33. enu tree vil MODE control 1 4 Motion Sensor MS 100 2 16 N NL control 2 8 O Output power 2 12 2 16 P Presentation mode 1 4 Pulselength 2 12 2 15 PWR switch 1 3 R H B key sonar mode 2 10 vertical fan mode 3 6 H B marker 2 10 Raise lower error message 7 6 RANGE control sonar mode 2 2 vertical fan mode 3 2 Index 1 Range preset e s mode 6 4 sonar mode 6 4 vertical fan mode 6 5 S Screen adjustment 6 2 SECTOR control sonar mode 2 3 vertical fan mode 3 4 Sonar menu 2 15 opeed warning 7 7 Sub panel description 1 2 System configuration vi System menu 6 4 System setting menu 6 1 T Test pattern 7 6 Tilt angle 2 4 TILT control sonar mode 2 4 2 14 vertical fan mode 3 4 Tilt error message 7 6 TRACK key 2 17 TRAIN control sonar mode 2 15 vertical fan mode 3 3 Train error message 7 8 Train tilt test 7 5 Transceiver unit care 7 1 Transceiver unit error message 7 7 TRANSDUCER switches 1 3 Troubleshooting display unit test 7 3 error messages 6 test pattern 7 6 train tilt test 7 5 troubleshooting table 7 9 TVG control sonar mode 2 13 vertical fan mode 3 7 3 8 Tx rate 2 15 Tx rate adjustment 2 8 V V H RANGE key 3 2 Vertical marker 3 6 Index 2
34. g is performed only in vertical direction It forms a sound ing area of a half circle like a slice of watermelon to observe a vertical section of underwater conditions The bearing of the vertical sounding beam can be selected manually or automatically MEME Sounding Beam Screen Display 1 Bearing of the Fg OREZ sounding beam 1 Bearing of the 0 b beam ar s re a ing direction 2 Tilt ix T X H t 2 Sector center 1 p 3 Display area 3 Display Select the bearing of the sounding beam 1 by TRAIN 2 Sector center control the sounding sector center 2 by the TILT control 3 Display area and the display area 3 by the SECTOR control Figure 3 10 How the vertical fan picture is painted Port starboard picture bottom You can see fish echoes at the center right of the CRT The bottom is displayed wider as the distance from the ship s posi tion increases Therefore it may be difficult to discriminate bot tom fish Own ship Bottom Figure 3 11 Port starboard picture When ship passes over fish schools The sounding beam is directed fore aft and the display is off centered to present a wider view of the area forward of the ship You can clearly see fish schools approaching from the bow of the ship Automatically shifted according to the operation control set tings Forward Own ship Fish Wa schoo Figure 3 12 Picture appearanc
35. hen the sidelobe points ver tically Also poor soundome projection may result in a similar false echo Figure 2 21 Sidelobe echoes Noise and interference When the fishing ground is crowded with many fishing boats the sonar is subject to interference from ultrasonic equipment echo sounder or sonar on other boats as well as those on own ship For instance interference from the sonar operated on other boats will show itself on the display as in A in the figure be low This interference can be suppressed by changing the Tx rate on the SONAR menu Noise from marine life shows itself on the displays as in B in the figure below This type of noise can be suppressed with IR in the SONAR menu A Inteference from B Interference from other sonars marine life Figure 2 22 Noise and interference 2 23 2 19 Sonar Mode Indications Normal sonar display Heading Sector center marker ee eee ee ed atl 2 B157 5 H 7 pue e d i 6 OO Trackball marker N 6 A 4 iw 15 data North marker Range marker Bottom echo Bearing marker 239 lec C1 0 9 Range and bearing P 40 D35 0 C2 0 8 B 0 5 marker data 9 34 43 261N Ca 2089 135 20 282E Depth latitude longitude Requires navigator Heading north marker require current indicator and gyro or log Range Tilt Bearing scale Current tide vector Own ship marker Trackball marker C
36. igure 7 5 Test pattern 4 Toreturn to the SYSTEM menu press the MENU key again 5 To quit reset the power T Error Messages Raise lower error message If the power is not applied to the hull unit the following mes sage appears on the screen and the buzzer sounds HULL UNIT POWER OFF CHECK BREAKER AND FUSE PRESS R B KEY TO SILENCE ALARM Figure 7 6 Haise lower error message If this occurs turn the power off and check the breaker and fuse as the screen suggests Transceiver unit error message If the power is not supplied to the transceiver unit the following message appears on the screen and the buzzer sounds TRANSCEIVER UNIT POWER OFF CHECK FUSE ON TRANSCEIVER UNIT PRESS R B KEY TO SILENCE ALARM Figure 7 7 Transceiver unit error message If this occurs turn the power off and check the fuse as the screen suggests Speed warning Because the transducer may be damaged if it is kept lowered when ship s speed exceeds 15 knots based on the speed rela tive to ground fed from nav sensor the following message appears and the buzzer sounds Press the R B key to silence the buzzer and return to the nor mal sonar picture Raises the transducer TRANSDUCER REMAINS LOWERED REDUCE SHIP S SPEED AND PRESS T KEY PRESS R B KEY TO SILENCE ALARM Figure 7 8 Speed warning T 7 Train error message If something is wrong with the train control circuit the following message appears a
37. ional supply Selects the detecting display range Turn clockwise to increase the detection range The selected range appears in large characters for a few seconds and remains at the upper right corner of the screen Determines the center bearing of the train sector The selected bear ing appears by a large white mark on the bearing scale In the expanded sonar mode it controls the direction to be off centered four directions In the vertical fan mode it determines the bearing of the vertical fan training Adjusts the sensitivity of the receiver Turning the control clockwise increases the sensitivity When changing the range and tilt settings readjust the sensitivity For normal use set it between 3 and 5 In the sonar mode it controls the tilt angle between 5 and 90 The setting angle is set in 1 degree steps and appears at the upper right corner of the screen In the vertical fan mode it determines the sector center of vertical scanning In the sonar mode it selects the width of the transducer training sector among six positions 45 90 135 180 225 and 360 The direc tion of training can be made in both directions except at the 360 set ting In the vertical fan mode the sector widths are 36 60 96 120 156 and 180 FULL HALF key switches the training sector or sector width between full circle and half circle by single key stroke The trackball moves the trackball marker The trackba
38. key 5 To quit reset the power Display test operation 1 Select DISPLAY TEST OPERATION from the SYSTEM menu 2 Press the MENU key TEST appears on the screen while the display unit is being tested 3 To quit reset the power 6 4 Dual Menu Press the MENU and choose DUAL to open DUAL menu SONAR BOTTOM 3D E S DUAL MODE BOTTOM SONAR NET MOUTH SHIFT NET MOUTH WIDTH NET MOUTH HEIGHT NET DEPTH MANUAL HOR SCAN RATE VER SCAN PATE EXIT PRESS MENU KEY Description of DUAL menu DUAL MODE Choose the display to show on the lower 1 3 of the combination display E S Echosounder BOTTOM Verti cal Fan SONAR Sonar picture from the CH 37 is displayed like an echosounder picture The default setting is E S NET MOUTH SHIFT Set the left right position of the net mouth mark The setting range is 999 to 999 m and the default setting is 0 m Setting range and default setting change with unit of measurement NET MOUTH WIDTH Set the left right width of the net mouth mark The setting range is 1 999 m and the default setting is 100 m Setting range and default setting change with unit of measurement NET MOUTH HEIGHT Set the up down width of the net mouth mark The setting range is 1 999 m and the default setting is 30 m Setting range and default setting change with unit of measurement NET DEPTH Choose the net mouth mark depth setting method The default setting is AUTO AUTO Use
39. lection Sector step The FAST SCAN key in the sub panel 2 selects sector step in 45 or 6 2 4 Setting the Tilt Angle The tilt angle shows the direction to which the sound wave is emitted When the sound wave is emitted horizontally the tilt angle is said to be 0 and when emitted vertically 90 To set a tilt angle operate the TILT control Watch the tilt angle indication at the top right corner of the screen The tilt angle can be set in one degree steps from 5 upward to 60 down ward Finding a proper tilt angle is important when searching for fish Bottom echo and tilt angle Case 1 Tilt angle 30 to 40 This tilt angle will display the entire bottom since it is captured by the full width of the beam Case 2 Tilt angle 10 to 20 This tilt angle will only display half the bottom since it is only captured by the lower half of the beam Case 3 Tilt angle 0 to 5 This tilt angle may or may not capture the bottom since the returning echo is weak How to discriminate fish echoes from the bottom The figure at the top of the next page illustrates how two fish schools 8 and b are displayed on the screen using three dif ferent tilt angles Case 1 Tilt angle 30 to 40 Fish school is obscured by the bottom Case 2 Tilt angle 10 to 20 Fish school is located above the bottom midwater Case 3 Tilt angle 0 to 5 Fish school is located close to the bottom ade Bottom Fish school
40. left in figure below CUSTOM MODE menu 4 Repeat step 2 for remaining custom mode keys Note Custom mode key labels are provided on page AP 1 Cut them out and insert them in the label cases on the front panel See the illustration on the next page for how to insert them 5 3 Custom Mode Operation 1 Press desired custom mode key 1 2 or 3 2 To escape from the custom mode settings adjust any con trols Example FISHING GROUND SECTOR uu MODE uM 9 IMODE IN IMODE Fold here SECTOR 360 SECTOR 180 TRAIN 0 TRAIN 90 TILT 30 TILT 90 Record settings on label and insert it in label case on front panel CUSTOM MODE CH 37 5 2 MENU SETTINGS 6 1 System Setting Menu 1 Turn on the power while pressing the MENU key Release the key when you hear a beep The SYSTEM menu ap pears SYSTEM SETTING 3D DISPLAY SHIP S POSITION CURRENT DATA DEPTH DATA HEADING INDICATION NORTH MARK TRACK HDG SPD DATA NAV DATA ON L L LOP FLOW FROM FLOW TO ON TRUE AZ ON 20R CI LORANC LORAN A DECCA OTHERS CIF 2400 4800 1 2 1 ft fa HIRO FULL gt TI TM Im mM lt 2 mimi ZO Z I gt DATA FORMAT FOR NAV2 CIF BAUD RATE TVG CORRECTION UNIT V MODE MANUAL TRAIN DEGAUSSING INTERVAL FACTORY SETTING NO O O TI Z O EXIT PRESS MENU KEY Default settings circumscribed Figure 6 1 SYSTEM SETTING menu 2 Select
41. ll mark data that is slant range horizontal range depth and bearing to the track ball marker are always indicated on the screen Additionally this con trol positions the R B Range Bearing marker and sets the event marker with the R B and the EVENT keys The EVENT key displays the event marker Provides user defined sonar settings with a single key The ENTER key opens the custom mode key setting menu Figure 1 1 Main panel 1 1 Sub panel Sub panel 01 01 0 LEVEL TIME NL AUDIO L TVG 0 DIMMER BRILL i HUE E S DEGAUSS FAST TRACK V H AUTO SCAN RANGE TRAIN BOTTOM MODE MES Sub panel Function Deseripton LEVEL controls the receiver sensitivity to eliminate surface noise which may mask shallow targets TIME determines the TVG effective range Rejects noise which appears on the screen in light blue or blue A setting between 2 and 4 will suffice in most AUDIO Adjusts the volume of the external loud speaker which monitors target echoes DIMMER Adjusts panel backlighting BRILL Adjusts screen brilliance Function Description Changes the background color of the display in the sequence of deep blue blue black Turns the E S combination display on off Optional devices required DEGAUSS The screen is automatically degaussed at the interval selected on the system setting menu To manually degauss the screen press this key AST SCAN Changes the secto
42. nd the unit stops operating Turn the PWR switch off and contact your service agent at your earliest con venience TRAIN NG Figure 7 9 Irain error message Tilt error message If something is wrong with the tilt control circuit the following message appears and the unit stops operating Turn the PWR switch off and contact your service agent at your earliest con venience TILT NG Figure 7 10 Tilt error message 7 8 Troubleshooting Table Bottom echo becomes irregular Somewhat strange color The table below provides common symptoms of equipment troubles and the means to rectify them If normal operation cannot be restored do not check inside the system Any repair work is best left to a qualified technician Check Power supply Check ship s mains voltage at the power plug connected to the power unit Fuse If blown replace with 10A fuse Call service technician if it blows again NEVER use a fuse of a higher rating Rough seas Distance to sea bottom changes due to rolling and pitching Long range selected Since transmission period is a little longer ship s rolling and pitching are apt to effect detection of echo TX OUTPUT POWER set to other than ai tk Check the TX OUTPUT POWER setting on the SONAR menu and set it to C for max output power TVG effect is excessive Excessive TVG results in elimination of useful echoes Note Readjustment of IVG is reguired whenever the GAIN control is
43. ng from own ship to the specified posi tion on the screen and combined with the R B and EVENT keys it switches the R B and event markers on off With navi gation data input the event marker moves with ship s move ment Function Procedures Purpose 1 Position the trackball marker on the location desired Trackball data Trackball marker 2 Read the trackball data displayed at the upper left corner of the screen Event marker Event marker 2 Press the EVENT key to inscribe the event marker 3 To erase the marker place the trackball marker outside the echo display area and press the EVENT key Note CH 37 stores one event marker R B marker 1 Position the trackball marker on the location desired R B marker R B marker data 2 Press the R B key The range and bearing markers appear and their data appears at the bottom left hand side of the screen 3 To erase the marker place the marker near the own ship position or outside the echo display area and press the R B key 2 9 Selecting Training Sector Quickly Normally the training sector is selected by the SECTOR con trol To the training sector more quickly however use the FULL HALF key This key allows switching between full circle and half circle training sector in a single key stroke FULL CIRCLE HALF CIRCLE FULL HALF FULL HALF key KL O SECTOR Figure 2 9 How the SECTOR control and FULL HALF key work 2 10 Suppressing
44. on Or the screen Normally set it between 2 and 4 LEVEL TIME i With the trackball marker measure the distance to a fish school or the bottom Reduce the output power if necessary Normally set it for maximum position C Turn off FAST SCAN mode if longer detection is required HUE E S DEGAUSS Bata iaa FAST TRACKN VH AUTO SCAN RANGE TRAIN BOTTOM MODE Figure 2 1 Main panel and sub panel controls 2 1 2 2 Selecting Range 2 2 The RANGE control selects the detection display range Se lect the range according to either the fish species being searched or the depth desired Normally it is set so that the bottom is traced at the lower part of the screen like an echo sounder mM HF SEA SURFACE kre Range indicated Tahan on the screen ao TE na Figure 2 2 Range selection Table 2 1 Transducer frequency and range Note Unit of range measurement may be changed through the SYSTEM menu For details see page 6 1 2 3 Selecting Sector Sector Stepping Sector width sector means the width of the transducer training The SEC TOR control selects the training display area among six posi tions In the full circle mode 360 the direction of training is clockwise only Table 2 2 Transducer training sector Mode Transducer Training Sector display area 159 90 135 180 225 and 360 Selected by FULL HALF key CK Sector center marker AN Training sector Y Figure 2 3 Sector se
45. ound 5 to eliminate them Locate a fish school on a long range setting which is ap proaching your vessel Adjust the tilt to keep the fish school in the center of the sonar beam Check that the fish echo appears in the same color while it approaches If the color changes suddenly to weaker colors as the fish echo nears the TVG is improperly set Adjust the TVG level to correct it If sea surface reflections and noise remain try to remove them with the interference rejector IR on the SONAR menu and NL control as described on page 2 8 2 13 2 13 Relocating Fish School for Easy Observation When a fish school is near the edge of the screen and inconve nient for observation use the Q expanded sonar mode and adjust the TRAIN control off center function to relocate the fish school close to the screen center Fish school 1 Fish school ay Own ship Figure 2 12 How to relocate fish school 2 14 Finding Fish School Center When you want to find the center depth of a fish school change the tilt angle and observe the presentation as follows 1 Select a narrow sector range 45 and capture the target echoes 2 Adjust the tilt angle with the TILT control slowly and ob serve the change of the presentation color 3 The echo presented in the strongest color is the center of the fish school SSS de Tilt odd DE SEAN setting T 8 TILT Figure 2 13 How to find fish school center 2 15 Sonar Menu Operation
46. ourseline Requires navigator or current indicator Current data Requires current indicator Figure 2 28 Indications on the normal sonar display 2 24 Expanded sonar display Sector center marker ov9 eonetuhe num Trackball marker data A e9 e e eo noa Sector width marker Own ship marker Trackball marker Figure 2 24 Indications on the expanded sonar display 2 25 2 20 Application Example The figure below shows a typical sonar mode application Sonar Horizontal Mode PURSE SEINING Search for fish school with RANGE and TILT controls Go to 4 on next page RANGE After blinking remains lit GAIN oon NOISE LIMITER 2 4 TVG level amp time 3 5 TX POWER C Use these settings initially Fine tune as necessary Observe bottom on the screen Go to 4 on next page RANGE After blinking remains lit Select the proper range and For bottom trawling sonar is usually used to detect net hangs ahead ilt angle rather than to detect fish close to the bottom since bottom returns usually mask the weaker fish targets close to the bottom If the fish school is dense enough and off the bottom they can be detected by sonar 2 26 Q Change tilt angle for Q Monitor situation of both strongest fish school fish school and net Fish school Fish Scout boat J a 2 school Here comes fish school Net Narrow the train a
47. properties are nearly equal The sonar operator will be quite inconvenienced if these echoes are directly displayed on the screen since he won t be able to judge the actual size of the target from the size of echoes displayed on the screen To overcome this inconve nience use the TVG function It compensates for propagation loss of sound in water amplification of echoes on short range is suppressed and gradually increased as range increases so that similar targets are displayed in similar intensities irrespective of the ranges to them Without TVG function Noise caused by strong reflection of surface turbulence In the CH 37 the TVG LEVEL and TIME controls compensate for propagation loss The effective distance is up to 1000 m approximately Proper TVG setting Nearer target Echoes of equal ova echoes TPE y size targets are 27 8 in larger size Reduc aa presented in the E EE Ganda same color and size Sg Lb Noise is rejected using TVG Position TVG Range OO LEVEL TIME TVG Figure 2 11 How to adjust TVG The TVG also functions to suppress unwanted echoes and noise which appear in a certain range area on the screen as shown in the figure above To adjust the TVG oet TVG time between 3 and 5 approx 130 300 m This is the standard setting and you can maintain it in most cases When sea surface reflections or plankton layers disturb the picture set the TVG level control ar
48. r distance Only the latest echo is painted like the vertical mode presentation This mode may be turned on in the SYSTEM menu 3D display slant perspective view Display contents are same as front perspective mode except the per spective is different This mode may be turned on in the SYSTEM menu Note Asterisk marked modes require external signal interface and external E S interface Furthermore the E S key on the sub panel 2 must be turned on 1 6 Background Color The background color is available in deep blue blue or black with the HUE key 1 7 Degaussing the Screen 1 6 The screen is automatically degaussed at the interval selected on the SYSTEM SETTING menu However when the picture or picture color appears to be distorted manually degauss the screen with the DEGAUSS key SONAR MODE 2 1 Typical Operating Procedure Turn on the display unit Lower the transducer Adjust the brilliance of the CRT Set the MODE knob to or position select the range desired with the RANGE control 6 Select the automatic training area and center position with the SEC TOR and TRAIN controls The FULL HALF key provides a quick change of the area 225 360 Adjust the tilt angle with the TILT control See page 2 3 through 2 5 for details Adjust the GAIN and TVG controls Gain 3 5 TVG level amp time 3 5 9 Adjust the NL control if a large number of small blue dots appear
49. r steps 45 6 in sonar mode and 6 3 in vertical fan mode TRACK Turns the course line plotting on off Navigation equipment required V H RANGE Changes the horizontal range scale in the vertical fan mode AUTO TRAIN Changes the auto and manual train in the vertical fan mode MENU Displays the menu screen of the mode in use HUE E S F Figure 1 2 Sub panel 1 and sub panel 2 1 2 1 2 Turning the Power On Off Power on Press the PWR switch on the main panel The lamp above the switch lights to show that power is turned on Power off Retract the transducer with the 47 key on the main panel The lamp above the switch lights while the transducer is being raised and goes off when the transducer is fully raised Then press the PWR switch Note The transducer is automatically retracted into the tank even if the PWR switch is pressed before retracting the transducer However for safety purposes make it a habit to retract the transducer before turning off the power 1 3 Adjusting Screen Brilliance Panel Backlighting The BRILL control adjusts screen brilliance and the DIMMER controls adjusts panel backlighting These controls are on the sub panel 1 1 4 Lowering the Transducer Press the 44 switch on the main panel to lower the transducer The lamp above the switch blinks while the transducer is being lowered and lights when the transducer is fully lowered CAUTION Observe maximum allowable ship s
50. rea and track fish school Fish school Trackball marker Observe movement of fish Q Set net around fish school and scout boat school Data for fish school pointed by trackball marker school oec s Scout Net boat ELS 7 JI boat Adjust tilt angle and observe Observe the net and the fish both screens school in it IN JJ gt z A Marker can b moved to any Q Expand historical display O Narrow the train area and and observe bottom track fish school Bottom Fish school MEN school Outcrop Outcrop Trackball marker Data of fish school bottom or outcrop pointed by trackball marker C 2 YAA gm Here comes Outcrop fish school DO NOT FORGET TO RETRACT THE SOUNDOME BEFORE TURNING OFF THE POWER E TEN 2 27 This page is intentionally left blank VERTICAL FAN MODE 3 1 Typical Operating Procedure Turn on the display unit Lower the transducer Adjust the contrast and brilliance of the CRT Set the MODE control to IN position select the range desired with the RANGE control 6 Select the bearing of the vertical scanning with the TRAIN control Determine the center direction of the vertical scanning sector with the TILT control and select the sector width with the SECTOR con trol Select the auto train sector on BOTTOM 3D menu if necessary 9 Adjust the GAIN and TVG on the BOTTOM 3D menu Gain
51. sonar beam does not hit the sea surface or adjust TVG When a narrow tilt angle is used sea surface reflections cover a large area as illustrated below E Sea surface 15 Sea surface LLL 15 Figure 2 19 Sea surface reflections Tilt angle indication Sea surface reflections Wake A wake produced by own ship or another ship can be a strong reflecting object when a narrow tilt angle is used As the wake appears as a thick continuous line it can be easily distinguished from a fish school A wake contains many air bubbles which attenuate ultrasonic energy making it difficult to sound beyond the wake v Other ship a SO Own ship s screw noise Own ship Do y NSN Padi Wake produced POSES Own ship s wake Own ship s produced when Screw noise own ship turned Figure 2 20 Wake appearance on the display 2 21 2 22 False echo by sidelobe An ultrasonic wave is emitted only in the direction set by the TILT control however there are some emissions outside the main beam These are called sidelobes The energy of the sidelobe is fairly weak but when the water is comparatively shallow and the bottom is rocky and hard strong signals are detected by the sidelobe These are represented on the dis play as a false echo as shown below Mainlobe echo Sidelobe echo Mainlobe L The bottom echo detected by sidelobe appears at a certain tilt angle w
52. t the equipment s power cord which can cause fire or electrical shock Use the proper fuse Fuse rating is shown on the equipment Use of a wrong fuse can result in equipment damage Do not operate the equipment with wet hands Electrical shock can result CAUTION Do not exceed 18 knots when operating the equipment and do not exceed 15 knots when lowering or raising the transducer The transducer may become damaged Do not use the equipment for other than its intended purpose Use of the equipment as a stepping stool for example may result in personal injury or equipment damage A warning label is attached to the equip ment Do not remove the label If the label is peeling off or is illegible contact a FURUNO agent or dealer N WARNING N Name Warning Label 1 To avoid electrical shock do not Type 86 003 1011 0 remove cover No user serviceable Code No 100 236 230 parts inside PPAT YAOI FUTFEL ABLES SEM D WSC H amp b5cfsl ct CAUTION WORKING WITH THE SONAR OIL Precautions e Keep oil away from eyes Wear protective gloves when working with the oil The oil can cause inflammation of the eyes e Do not touch the oil Wear protective gloves when working with the oil The oil can cause inflammation of the skin e Do not ingest the oil Diarrhea or vomiting can result e Keep the oil out of reach of children Emergency e f the oil enters eyes flush with clean water a
53. the IEC NMEA depth data sentence DBS MANUAL Set the depth with the T or N key on the sub panel HOR SCAN RATE Set the horizontal scan rate for the combi nation mode that is the number of horizontal scans produced per line drawn in the combination display The setting range is 1 10 and the default setting is 1 VER SCAN RATE Set the vertical scan rate for the combina tion mode that is the number of vertical scans produced per line drawn in the combination display The setting range Is 1 10 and the default setting is 1 This page intentionally left blank MAINTENANCE amp TROUBLESHOOTING Good performance depends on regular maintenance Follow ing the recommended procedures in this chapter will keep the equipment operating in top condition for years to come A WARNING ELECTRICAL SHOCK HAZARD Do not open the equipment Only qualified personnel should work inside the equipment 7 1 Maintenance of Display Unit e Handle with care Corrosion may start even from a scratch e Allow space around the unit for ventilation Keep it away from equipment with magnets such as a speaker large capacity transformer and also magnetic sen sitive units such as gyrocompass or cassette tape Clean the filter and screen with a wet or dry soft cloth Do not use commercial cleaners to clean the display unit they can remove paint and markings Cover the display unit when it is not in use Degauss the displ
54. the picture is painted The wide sounding beam is emitted from the soundome at a certain tilt angle see hatched area in the figure below The information target echoes obtained by this beam is displayed in 45 sector of the screen Thus all directions around the boat are s ounded in 8 times of transmissions Note When the FAST SCAN is switched off the equipment operates in a narrow sounding beam Then the echoes appear on a 6 sector in each transmission so 60 times of transmissions are required to complete full 360 pic ture 6 x 60 360 This means that sounding speed reduces However since transmission power is concen trated into the narrow sounding beam a superior detec tion range is obtained Furthermore since the bottom contour is painted distinctly bottom fish detection may become easier Sounding Beam Screen Display Freq 60 kHz es TX 4 Vy E i Tilt 6 609 16 d U A EA an Un When the narrow sounding beam 6 degree step operation is selected 60 transmissions are required to complete the full circle detection Figure 2 16 How the picture is painted Bottom echoes When the tilt angle is widened the bottom echo illustrated be low will appear on the display When the tilt is narrowed the bottom trace becomes wider and weaker By observing the bottom condition on the display the skipper can prevent net damage A Flat bottom Tilt angle 10 to 15 Narrow tilt angle
55. train center to the fore aft direction Observe the fish school near the bow of the ship or inspect the bot tom contour 2 After detecting a fish school steer the boat toward that direction turning off the AUTO TRAIN to observe that direction 4 Steered e e DN 3 When approaching the fish school change the beam direc tion to port starboard by the TRAIN control and maneuver the boat so that the fish are led into the trawl net 4 To observe the hauling of the net turn the sounding beam to the fore aft direction Figure 3 16 Vertical fan mode usage in trawling 3 13 2 PURSE SEINER Usage Tracking fish Observatio of fish movement bottom shape Confirmation of net forming 1 Approach the fish school while observing their distribution on the sonar mode 2 While approaching face the sounding beam toward the fish schools and confirm their distribution The display shown below is off centered to obtain a wider view of the starboard Fish school Automatically shifted 3 Shoot the net and then observe the location of the fish and the status of the net Figure 3 17 Vertical fan mode usage on purse seiner 3 14 3D MODE The 3D mode shows vertical echoes real time echoes and a frontal or oblique image of the bottom just passed like a graphic track plotter This mode is useful for locating a wreck a shoal or a fishing reef Vertical echoes can be turned on off through the BOTTOM 3D menu
56. water OFF Standard TVG curve 1 2 1 2 of theoretical absorption value added to TVG curve 1 Full theoretical absorption value added to TVG curve Selects unit of depth measurement m meters ft feet fa fathoms HIRO Selects manual training sector width for the Vertical Fan mode Half half circle Full full circle Selects screen degaussing interval Yes restores default system menu settings 6 2 Screen Adjustment 6 2 Screen size and position can be adjusted as follows 1 Turn on the power while pressing the MENU key to display the SYSTEM menu Select SCREEN ADJUSTMENT Press the MENU key SCREEN ADJUSTMENT H POSITION V SIZE V POSITION DEFLECTION DIST BRIGHTNESS EXIT PRESS MENU KEY Effective picture Effective picture marker inside marker outside Figure 6 2 Screen adjustment screen 4 Select item with up and down arrow keys 5 Adjust item with left and right arrow keys H SIZE Sets picture size in horizontal direc tion gt increases size lt de creases size H POSITION Adjusts picture position in horizontal direction gt shift right left respectively V SIZE sets picture size in vertical direc tion gt increases size de creases size V POSITION Adjusts pictureposition in vertical direction gt shift right left respectively DEFLECTION DIST Adjust deflection in vertical direc tion Adjust
57. y Release the MENU key when you hear a beep The SYSTEM menu appears as shown below SYSTEM MENU SYSTEM SETTING RANGE SONAR MODE RANGE VERTICAL FAN MODE RANGE SHIFT E S COLOR LANGUAGE DISPLAY TEST1 ROM RAM KEY TRAIN TILT TEST SCREEN ADJUSTMENT TEST PATTERN DISPLAY TEST2 OPERATION DEFAULT EXIT TURN OFF THE UNIT Figure 7 2 System menu 2 Select DISPLAY TEST1 ROM RAM KEY with the arrow keys on the sub panel 2 Press the MENU key to start the test The program no Tx frequency and pitch and roll angles are displayed and the ROM RAM SI O are checked Operate each key and control on the main panel sub panel and remote control box A pressed key s on screen indica tion changes to 1 when the key is pressed 0 when it is released To return to the SYSTEM menu press the MENU key again To quit reset the power DISPLAY TEST ROM Program version PROGRAM NO 0650101 xxx MAIN PANEL Main n panel NO is displayed ROM ROM OK check Switch is Be ella Dos SRAM OK 12 12 normal if value h h operation and Tx fre VRAM OK 0 SIR ape rien quency roll angle and SIO1 OK 12 pitch angle are displayed SIO2 OK TX FREQUENCY 60KHZ ROLL 0 PITCH 0 REMOTE CONTROL SUB PANEL Sub panel 0 255 255 255 check Switch is normal if value changes when switch is operated Hemote Control Box check Switch is normal if value changes when switch is operated EXIT PRESS ME
58. y i i ota rores ica arra neptem tn en 2 11 2 10 Suppressing Bottom and Sea Surface Reflections in Shallow Fishing Grounds 2 11 Zh oOUDDIGSSIHO DODNOLT WAN eco E aa 2 12 2 12 Displaying Surface Fish Clearly TVG adjustment 2 12 2 13 Relocating Fish School for Easy Observation cccccccseecceeceseeeeceeeeeeeseeeeesaaeeeees 2 14 2 14 Finding Fish School Center Er ERROR 2 14 215 Sonar Men 4B ec 1116 eta ee ne i E E EER 2 15 RM e E MS ERIT ETT 2 16 2 17 Turning Trackline Plotting On Off ger 2 17 2 18 Interpreting the Display Sec 2 18 2 19 Sonar Mode INdiCaUonS sca eee ee 2 24 2 LOAP 8 675 HON 21 0 een ener TOU 2 26 VERTICAL FAN MODE 91 Toca Operating F NOC COINS ee aa Sania 3 1 39 2 Selecting Range EE OUT 3 2 3 3 Selecting Bearing for the Vertical Fan ooo W oom Waah 3 3 3 4 Selecting the Display Sector an sch OT o 3 4 3 5 Automatic Shifting of Own Ship Position arcane uetcstaccsetardes coccar dec caaeaneancaseeucuecteereaeecacsdescast 3 5 3 6 Rejecting Sonar Interference and NOISE samaan dandanan stint enn mm bnS ER RA 3 5 3 7 Horizontal Vertical and Event Markers trackball operation 3 6 Ses Appiying Proper AC ENERO te aa on naa aan 9 7 3 9 Bottom 3D Menu OMe QUOI zu qs ceca i aeu qua epa aa un eeu capat aeree amen REUS 3 8 240 Interpreung Ihe DISDIGV mini tubes tubus tubus akan tabe taber tube tede edes eiue 3 9

Furuno CH-37 Radar Detector User Manual

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