User manual FURUNO DS-30 OPERATORS MANUAL

[. . . ] Fire or electrical shock can result if the rain or water gets into the equipment. Do not operate the equipment with wet hands. A heater can melt the equipment's power cord, which can cause fire or electrical shock. Use of a wrong fuse can result in damage to the equipment. [. . . ] (Most other doppler sonars use two hull units: one each for measuring ship's transverse speed at the fore and the stern. 4) Rate-of-turn gyro uses optical fibers instead of moving parts, providing high reliability. 5) Logically arranged presentations of information on the color LCD for instant recognition of ship's motion and speed together with under-keel clearance, current and wind conditions. 6) GPS navigator connection provides ship's ground speed at all times. 7) Conforms to the following standards: IMO A. 824(19), as amended by MSC. 96(72), IMO A. 694(17), IEC 61023, IEC 60945 (3rd edition), IEC 61162-1 (2nd edition) 1-1 Interpreting Readings and Advanced Operation In this section, the number beside each header corresponds to the same number in the illustration of the SPEED DATA MODE screen on the preceding page. If there is an operation related to a headed item, the operating procedure is shown. 1. Echo Monitor Monitors received echoes for the past two minutes, showing echo type as follows. Three modes are available: · Ground tracking echo (green) · Water tracking echo (blue) · No echo (background color) Press the TRACKING MODE key to change the tracking mode. · Auto: Automatic changeover between ground tracking and water tracking. · Ground: Ground tracking · Water: Water tracking Value over-the-ground or through-the-water is displayed as determined by the tracking mode. Value over-the-ground or through-the-water is displayed as determined by the tracking mode. Value over-the-ground or through-the-water is displayed as determined by the tracking mode The speed and course measured by a nav sensor (GPS, Loran C) are displayed. Note that only true course is displayed. If the speed or course signal is lost the respective indication is erased 30 seconds later. Selecting nav sensor The nav sensor may be selected on the parameter set menu. Under-keel Clearance (UKC) The under-keel clearance measured by the DS-30 or external sounder is displayed. 6-2 13. SPECIFICATIONS OF DOPPLER SONAR DS-30 1. Ship's Speed Bow: Fore-aft: -10. 00 to + 40. 00 knots Port-stbd: -9. 99 to + 9. 99 knots Stern with optional Laser gyro: Port-stbd: -9. 99 to + 9. 99 knots b. Speed Measurement Depth Ground tracking:1 to 200m below hull bottom Water tracking: 3 to 25m below hull bottom (Above figures will changed depending on installation conditions and surrounding water conditions. The measuring accuracy will be reduced for the depth shallower than 30 m. ) c. Current Direction: 360 degrees (Relative or True with gyro signal input) Speed: 0. 0 to + 9. 9 knots d. Current Measurement Depth 2 to 100m below hull bottom (clearance of more than 8m required) ±0. 2% or ±0. 01 m/sec for low ship's speed ground tracking. [. . . ] Checksum VDR - Set and drift $--VDR, x. x, T, x. x, M, x. x, N*hh<CR><LF> || | | ||| | | | | | | +--------- 4 | | | | +--+----------- 3 | | +--+----------------- 2 +--+----------------------- 1 1. Checksum VHW - Water speed and heading $--VHW, x. x, T, x. x, M, x. x, N, x. x, K*hh<CR><LF> || | || | ||| | | | | | | | | +--------- 5 | | | | | | +--+----------- 4 | | | | +--+----------------- 3 | | +--+----------------------- 2 +--+----------------------------- 1 1. Checksum 15-6 VLW - Distance travelled through the water $--VLW, x. x, N, x. x, N*hh<CR><LF> | | ||| | | | | +--------- 3 | | +--+----------- 2 +--+----------------- 1 1. Total cumulative distance, nautical miles 2. [. . . ]