Technical Specification

• Display Type: 10-inch Color LCD (some older versions may have been monochrome)
• Resolution: Typically 640 x 480 pixels (VGA)
• Viewing Angle: Wide viewing angle for bridge visibility.
• Character Size: Selectable, often 15mm or 21mm high.
• Presentation Modes:
  • Vessel Speed Display (Longitudinal & Transverse)
  • Graphic Berthing Data (with predicted track marker)
  • Graphic Navigation Data & Bottom Clearance / Under-Keel Clearance (UKC)
• Controls: Touch keys and/or trackball for operation.
• Panel Dimmer: Adjustable illumination for varying light conditions.

Speed & Distance Measurement (System Performance, driven by Transducer & Processor):

• Measuring System: Paired-beam Doppler Sonar
• Ultrasonic Frequency: 440 kHz (Tri-beam transducer)
• Speed Range (Longitudinal – Fore-AAft): -10.0 to +40.0 knots (through-the-water / over-ground)
• Speed Range (Transverse – Port-Starboard): -9.9 to +9.9 knots
• Distance Run: 0.00 to 999,999.99 nautical miles (resettable)
• Accuracy:
  • Speed: $pm1.0$ or $pm0.1$ knots, whichever is greater (Ground-speed at high speed)
  • Speed (low speed / berthing): $pm2.0$ or $pm0.02$ knots, whichever is greater (Ground-speed at low speed)
  • Distance Run: $pm1.0$ or $pm0.1$ nautical miles, whichever is greater
  • Note: Accuracy is subject to environmental conditions (e.g., shallow water effects, wind, current, tide, sensor location).
• Tracking Modes:
  • Ground Tracking: 1 to 200 meters below hull bottom
  • Water Tracking: 0.5 to 25 meters below hull bottom (typically 2 to 25 meters)
• Water Tracking Switching: Automatic or Manual
• Working Depth: Water depth greater than 3 meters beneath the keel required for reliable operation.
• Tide Speed and Direction: Displayed in relative or true bearing.

Interface & Connectivity:

• Serial Data Output (NMEA 0183):
  • Multiple ports (typically 2-3 output, 1 input)
  • IEC 61162-1 (NMEA 0183 Ver. 2.0 compatible, commonly outputs VBW, VLW sentences)
• Analog Outputs: Speed signals for analog displays (e.g., $pm3.3textmA$ to $10textmA$ / $pm10textkt$ to $+30textkt$)
• Distance Run Output: Contact closure pulses (e.g., one pulse per $0.005textNM$)
• Input Sentences (IEC 61162-1): Supports various NMEA sentences for integration with other bridge systems (e.g., for GPS, Gyro, etc.).
• Optional Laser Gyro Interface (DS-340): For accurate transverse speed at stern in berthing mode, without requiring an additional transducer.

Power Supply (for the entire DS-30 system including display):

• System Source: AC 100/110/115/200/220/230V, 1 Phase, 50/60 Hz
• Power Consumption: Varies by system configuration and operational mode, but typically includes the Transceiver Unit, Signal Processor Unit, and Display Unit.

Environmental & Physical:

• Ambient Operating Temperature: -15°C to +55°C (for units in protected areas like the bridge).
• Relative Humidity: Up to 95% at 40°C.
• Waterproofing (Display Unit):
  • Front: IP56 (Protected against dust and strong jets of water)
  • Back: IP22 (Protected against solid objects >12.5mm and dripping water)
• Compass Safe Distance: Typically 0.50m (standard) from the display unit.
• Mounting: Designed for flush mounting in a console or bulkhead.

Compliance:

• IMO Resolution A.478(XII) (Performance Standard for Speed and Distance Measuring Equipment)
• IEC 61023 (Track Control Systems)
• IEC 60945 (General requirements for marine navigation equipment)