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COLOR SCANNING SONAR
CSH-7
MODEL
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c FURUNO ELECTRIC C O., LTD. Your Local Agent/Dealer 9-52, Ashihara-cho, Nishinomiya, Japan 662 Telephone: 0798-65-2111 Telefax: 0798-65-4200 FIRST EDITION : MAY 1997 All rights reserved. Printed in Japan PUB. No. OME-13020 (DAMI) CSH-7
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SAFETY INSTRUCTIONS CAUTION WARNING Use the proper fuse. Do not open the equipment. Use of a wrong fuse can result in fire or Hazardous voltage which can permanent equipment damage. cause electrical shock, burn or serious injury exists inside the Do not use the equipment for other than equipment. Only qualified its intended purpose. personnel should work inside the equipment. Personal injury can result if the equipment Do not disassemble or modify the is used as a chair or stepping stool, fo
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TABLE OF CONTENTS FOREWORD A Word to CSH-7 Owners ........................................................................................................ v Features..................................................................................................................................... v System Configuration .............................................................................................................. vi OPERATIONAL OVERVIEW Equipment Overview ........................
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INTERPRETING THE DISPLAY Seabed Echoes .......................................................................................................................6-1 Fish Schools...........................................................................................................................6-2 Sea Surface Reflections .........................................................................................................6-3 Wake .............................................................
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FOREWORD A Word to CSH-7 Owners Congratulations on your choice of the FURUNO CSH-7 Color Scanning Sonar. We are confident you will see why the FURUNO name has become synonymous with quality and reliability. For over 40 years FURUNO Electric Company has enjoyed an enviable reputation for qual- ity marine electronics equipment. This dedication to excellence is furthered by our exten- sive global network of agents and dealers. This equipment is designed and constructed to meet the rigorous demands
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System Configuration DISPLAY UNIT NAVIGATOR CSH-7010 CURRENT INDICATOR GYROCOMPASS (*) SPEED LOG TILT RANGE REMOTE GAIN CONTROLLER CSH-7040 (Option) TRANSCEIVER UNIT CSH-7020 RECTIFIER RU-3424 (Option) 100-115 VAC/ Ship’s Mains 200-230 VAC 24 VDC 1ϕ, 50/60 Hz HULL UNIT * Interface Module CSH-7050 (option) required to connect external equipment. 600 mm stroke CSH-7030 400 mm stroke CSH-7031 v
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OPERATIONAL OVERVIEW Equipment Overview All operations of the CSH-7 are carried out through the display unit and the remote controller (option). The uncluttered, straight- forward control panel of the display unit provides intuitive op- eration. If you change a control setting you will see the associated reaction on the display almost immediately. The handy remote controller provides armchair control of range, gain and tilt functions. COLOR SCANNING SONAR CSH-7 TX c d – + Control RANGE pan
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Display Unit Control Panel Description Raises, lowers the transducer, respectively. Lamp above a key blinks while the transducer is moving and lights when it stops. TX d c Turns transmitter on/off; freezes the display. The lamp above the switch lights when the transmitter is turned on and flickers when off. – + Selects a picture display range. Also functions to select items on menu screens. Note that this control turns endlessly in both directions. RANGE – + Adjusts receiver sensitiv
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Adjusting Screen Brilliance, Control Panel Backlighting The BRILL control adjusts screen brilliance, and the DIMMER control adjusts control panel backlighting. Lowering the Transducer Press the d switch. The lamp above the switch blinks, and lights when the transducer is fully lowered. CAUTION Do not exceed speed noted in the speci- fications when operating the equipment or lowering or raising the transducer. The transducer may become damaged. Do not press the c switch during lowering of the tr
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Seabed echo and tilt angle Case 1: Tilt angle 30 to 40 degrees This tilt angle will display the entire seabed since it is captured by the full width of the beam. Case 2: Tilt angle 10 to 20 degrees This tilt angle will only display half the seabed since it is only captured by the lower half of the beam. Case 3: Tilt angle 0 to 10 degrees This tilt angle may or may not capture the seabed since the re- turning echo is weak. How to discriminate fish echoes from the seabed The figure below illustrat
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Points to consider • Normally, a vertically distributed fish school is a better sonar target than the seabed, because it reflects the transmitted pulse back toward the transducer. • In case 3, both fish schools a 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 seabed on the display. • It is difficult to detect bottom fish when they are not distrib- uted vertically. Tilt angle for surface fi
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Depth (m) 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. Tilt angle and beam coverage Range (m) 400 100 200 300 0° (800) (200) (400) (600) 20(40) 5° 40(80) 60(120) 10° 80(160) 100(200) 15° 200(400) 300 m Vertical width of sonar beam 200 m 100 m 100 m 16° 28 m 56 m 84 m Figure 1-5 Tilt angle and beam coverage 1-6
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Adjusting the Gain The GAIN control adjusts receiver sensitivity (gain). Adjust it so fish echoes are clearly displayed with minimal noise on the screen. Too high a setting not only displays excess noise and makes it difficult to discriminate wanted echoes but also causes seabed echoes to be painted in strong colors, resulting in echoes being masked by seabed reflections. Normally, set the control somewhere between positions “3” and “7”. Gain low Gain high Gain proper Figure 1-6 Gain settings an
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MARKERS AND DATA Standard Markers and Data Heading data (Requires INTERFACE Board and gyrocompass.) Trackball marker data Slant range Range R Horizontal range Tilt T Depth B ° True bearing G Gain Trackball marker Bearing marker Heading marker Range marker Own ship marker Range ring (M) R ° B Bearing of bearing marker Unit of depth Range to measurement range marker Figure 2-1 Standard markers and data 2-1
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→ → Table 2-1 Standard markers and data description Marker/Data Description Own Ship Marker Marks position on the screen. Direction of arrow is heading. The trackball marker selects location for markers and own ship’s Trackball position. The trackball moves the marker over the entire screen. Marker Trackball data: Trackball Data : Slant range → → : Horizontal range ↓ ↓ : Depth B ° B : Bearing Bearing is shown in 360¡ or –180¡ indica
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Optional Markers and Data Various markers and data are available with connection of the INTERFACE Board and appropriate external equipment. Optional markers and data in the normal mode Heading indication E/N 187 R 300 Trackball 186 T 5° marker 16 data B 23°S G 3.0 E Trackball marker Latest event marker Electronic bearing scale N 3 Past 2 Tidal event marker current S marker 1 Course line Own W Latest 184 ship 16 event event ( 199) marker 300 B E/N marker dat
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Optional markers and data in the normal plus text mode Heading indication NW/N 496 R 800T 493 T 5° 51 B 52°S G 4.0 N Latest event marker W 3 2 Past event marker 1 367 S 38 Latest ( 165) event B 283° R 313 B 7°P marker data S 0.0 34: 13.02N 135: 16.39E Position C Nav NW/W C1: 1.1 315° D data 174 C2: 0.6 25° Tidal current T 17.0 C3: 1.2 64° data Figure 2-3 Optional markers and
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Table 2-2 Optional markers and data description Marker Description Latest Event Marker The position data of the latest event marker, that is, horizontal range (→), current depth (↓) and bearing. ( ) shows the latest event Data marker’s original depth, and remains unchanged regardless of ship’s movement or tilt angle. When the event marker is erased the above data → disappears from the screen. ↓ To erase an event maker, place the
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MENU OVERVIEW The menu system consists of four menus: Scan menu, Menu-1, Menu-2, and System. The Scan menu can be opened while trans- mitting, and contains items which the user will often change during the course of operation. Menu-1 (similar to the Scan menu), Menu-2 and System menus can be opened with the trans- mitter turned off. Menu-2 and the System menus contain items which once set do not require frequent adjustment. Scan Menu Operation Displaying the scan menu 1. Press the TX switch to l
