Technical Specification

Performance Characteristics:

• Settling Point Error:
  • ±0.3∘ (at latitude 0∘∼±35∘)
  • ±0.5∘ (at latitude ±35∘∼±65∘)
• Settling Time: 4 hours or less (typically)
• Follow-up Speed (Follow-up Rate): Max. 75∘/sec
• Dynamic Error (Max. Roll/Pitch Error): ±0.8∘ (at roll/pitch ±40∘, period 4 sec)
• Start-up Time: Approximately 4 hours (to achieve operational accuracy)

Output Signals (Standard):

• Step Signals:
  • DC 24V (1/60th degree step)
  • Output for up to 6 repeater compasses (standard configuration)
• Serial Data Output:
  • Multiple ports (typically 3-6)
  • IEC 61162-1 ed. 2 (NMEA 0183 compatible, e.g., HDT, HSC, ROT sentences)
  • IEC 61162-2 (High-speed data)
• Rate of Turn (ROT) Output:
  • Analog signal (e.g., $\pm10$mV/degree/minute)
• Analog Output for Autopilot: Specific interface for autopilot systems.

Input Signals (for External Devices):

• External Heading Input: For backup/redundancy from a magnetic compass or GPS compass (e.g., via serial data).
• External Rate of Turn Input: For synchronization or control.

Power Supply:

• Main Power Input: AC 100/110/115/220V, 1 Phase, 50/60 Hz
• Emergency Power Input: DC 24V (typical range DC 18V – 30V)
• Power Consumption:
  • Start-up: Approx. 200 VA (peak)
  • Normal Operation: Approx. 80 VA

Physical Characteristics:

• Master Compass (Gyro Sphere Unit):
  • Dimensions: Approx. $\text{H}400\times \text{W}300\times \text{D}280\text{ mm}$
  • Weight: Approx. 23 kg
  • Mounting: Typically bulkhead or pedestal mounted.
• Control Unit (Processor Unit):
  • Dimensions: Approx. $\text{H}144\times \text{W}288\times \text{D}150\text{ mm}$ (for rack/panel mounting)
  • Weight: Approx. 2.5 kg
  • Mounting: Panel or console mount.
• Cable Length: Standard digital cable connection between Master Compass and Control Unit.

Environmental Conditions:

• Operating Temperature: −10∘C to +55∘C
• Storage Temperature: −25∘C to +70∘C
• Humidity: Up to 95% non-condensing
• Vibration: Meets IMO/IEC requirements for marine navigation equipment.
• Ingress Protection (IP Rating): Typically IP22 (Master Compass), IP20 (Control Unit) for protected bridge environments.

Compliance & Approvals:

• IMO Performance Standards: A.424(XI)
• ISO Standards: ISO 8728
• Type Approvals: MED (Wheelmark), LR, DNV, ABS, CCS, NK, GL (various marine classification societies).

Features:

• Automatic Start-up Timer function.
• Automatic speed correction.
• External heading sensor interface (for backup).
• Long life gyro-sphere with low maintenance.