User manual FURUNO CI-68 OPERATORS MANUAL

[. . . ] DOPPLER SONAR CURRENT INDICATOR CI-68 Your Local Agent/Dealer 9-52 Ashihara-cho, Nishinomiya, Japan Telephone : fax : 0798-65-2111 0798-65-4200 All rights reserved. Printed in Japan FIRST EDITION : OCT. OME-72520 ( DAMI ) CI-68 *00014802200* *00014802200* *00014802200* *OME72520A10* *OME72520A10* *OME72520A10* SAFETY INSTRUCTIONS WARNING ELECTRICAL SHOCK HAZARD Do not open the equipment. Immediately turn off the power at the switchboard if water leaks into the equipment or something is dropped in the equipment. Fire or electrical shock can result if a liquid spills into the equipment. [. . . ] Text Window Scale DIV Tide Display Interval Position* Course plot display Description of course plot display indications Item Text window Description The text window can be turned on or off with TEXT WINDOW in the DISP2 menu. With the text window turned off, the amount of track displayed is greater. Ship's track starts extending from the screen center and when own ship position reaches the edge of the screen it is brought back to the screen center. You may turn the ship's track line on or off with SHIP TRACK in the DISP2 menu. The length of the tide vectors may be chosen with VECTOR LENGTH in the DISP2 menu. Vectors may be turned on or off with LAYER 1 ­ LAYER 3 in the DISP1 menu. You may choose the tide display interval with INTERVAL in the DISP2 menu. Position is shown in latitude and longitude. Ship's track Tide vector North mark Scale DIV Tide display interval Position 2-9 2. INTERPRETING THE DISPLAYS 2. 5 Echo Level Display Tide Vector Echo Level Echo Display Range Beam 3 Beam 1 Beam 2 Echo level display Description of echo level display indications Item Echo level Echo display range Description Echo status of beam 1 (fore), beam 2 (starboard) and beam 3 (port) is displayed in eight colors. The echo display range can be set with ECHO RANGE in the MENU 1 menu. 2-10 2. INTERPRETING THE DISPLAYS 2. 6 Error Display An error display is generated whenever display data or measured data is abnormal. Speed and course (fore-aft, port-starboard, drift angle) (1) No data input from transceiver unit (1) No data input from transceiver unit SPD/CSE kt SPD/CSE 12. 3 333 (2) Ship's speed error Tide vector, speed, graph and course plot displays SPEED FORE-AFT 12. 3 333 (2) Ship's speed error Text and echo level displays kt GT SPEED kt DRIFT SPEED PORT-STBD DRIFT ANGLE 12. 0 2. 7 13 12. 0 (2) Ship's speed error DIR 2. 7 ° 13 kt (2) Ship's speed error Ship's speed display Text display Speed and course error displays (1) No data is being input from the transceiver unit to the display unit. (2) This display appears when the ground tracking echo for ground tracking, reference layer for water tracking or GPS data from the GPS navigator is abnormal. INTERPRETING THE DISPLAYS Tide for three layers/tide differential (4) Depth setting error (4) Depth setting error TIDE SPD/VECTOR kt TIDE SPD/VECTOR 1 2m 1 2m 2. 3 140 (3) Echo from measuring layer is abnormal Tide vector, speed, graph and course plot displays 2. 3 140 (3) Echo from measuring layer is abnormal Text and echo level displays kt TIDE DIFF 1® 2 kt TIDE DIFF 1® 2 2. 3 140 3) Echo from measuring layer is abnormal Tide vector, speed, graph and course plot displays 2. 3 140 3) Echo from measuring layer is abnormal Text and echo level displays kt Tide and tide differential error displays (3) Displayed when echo for a measuring layer is not present. (4) Displayed when the depth setting for a measuring layer is improper. Improper depth setting conditions · Depth in ground tracking mode is less than 10 m. · Depth setting is more than 75% of actual depth. · Echo for set depth cannot be found because depth has become deeper than set depth. 2-12 3. CUSTOMIZING THE SYSTEM Less-often used functions are stored in the menu. The MENU 2 and INSTALLATION menus have three sub menus each. 3. 1 Menu Operation 1. The last-used menu appears. MAIN menu title MENU 1 SUB menu title MENU 2 ALARM INSTALLATION MODE DISP1 DISP2 TIDE VECTOR SHIP SPEED GRAPH COURSE PLOT TEXT ECHO LEVEL BACKGROUND CLR : OFF ON : OFF ON : OFF ON : OFF ON : OFF ON : OFF ON : BLACK WHITE BLUE Help MENU ON DISPLAY SETTINGS. Press or to choose the main menu desired among MENU 1, MENU 2, ALARM and INSTALLATION menus. To choose a sub menu, press to choose the sub menu title field and then press or to choose the sub menu desired. [. . . ] The frequency of the received signal is shifted from the transmitted frequency in proportion to the relative velocity between the vessel and underwater reflecting objects. This equipment calculates and displays movements of ship and currents at specific depths by measuring Doppler shifts obtained from three separate directions. Plankton layer Frequency of reflected signal is shifted in proportion to relative speed between the vessel and reflecting objects. Bottom AP-6 PRINCIPLE OF OPERATION Ship's Speed (Here, speed is a vector value including velocity and direction. ) Depending on the base of measurement, ship's speed is expressed in two ways: Ground tracking speed: (Absolute speed) Water tracking speed: (Relative speed) Ship's speed and course relative to bottom (fixed base) Ship's speed and course relative to water layer just below the vessel (floating base) Navaid-generated speed: Ship's speed and course obtained by external navigation (Absolute speed) equipment (GPS) GPS satellites Navaid-generated speed (Pseudo ground tracking speed) Water tracking speed Near-surface layer Ground tracking speed Fixed : Base of measurement Tide Tide is the movement of watermass at a particular depth. To know absolute tide (speed on ground), the following two data are required: 1) Ship's speed and course based on ground 2) Ship's speed and course based on measuring layer (A) Absolute tide is, then, given as a difference of these two speed vectors. AP-7 PRINCIPLE OF OPERATION Absolute Tide = (1) ­ (2) 2 Layer (A) 1 : Base of measurement Fixed Tide Differential Tide differential is a relative movement of tides at different depths, layer (A) and layer (B). To calculate tide differential, the following two data are used: 1) Ship's speed and course based on layer (A) 2) Ship's speed and course based on layer (B) Tide differential between two layers is, then, given as a difference of these two speed vectors. [. . . ]