Product Overview
The Merak-M03(60S) is a marine fiber optic gyro strapdown inertial navigation system (SINS) for surface ships and underwater vehicles. It achieves ≤4 nm/1 h CEP pure-inertial position accuracy and ≤0.5°·sec(L) RMS pure-inertial heading accuracy, with INS/DVL and INS/GNSS fusion for long-duration missions. Any-orientation startup within 10 seconds and 3 × RS-422 plus Ethernet interfaces simplify integration into submarine, USV and ROV navigation suites.
Key Features
- Pure-inertial position accuracy of ≤4 nm/1 h CEP and speed accuracy of ≤3.0 kn RMS
- Pure-inertial heading accuracy of ≤0.5°·sec(L) RMS and pitch/roll accuracy of ≤0.05° RMS RMS
- INS/DVL position accuracy of ≤0.6%D RMS and INS/GNSS accuracy better than satellite
- Gyro bias repeatability ≤0.05°/hr, angular random walk ≤0.01°/√hr
- Any-orientation startup ≤10 s with alignment time ≤15 min
- Conduction-cooled 110×110×100 mm housing, ≤1.7 kg, MTBF ≥20,000 hours
Technical Specifications
| Parameter | Specification |
|---|---|
| Accelerometer bias repeatability (1σ, months) | ≤50 μg |
| Accelerometer scale factor accuracy (1σ, months) | ≤50 ppm |
| Gyro bias repeatability (1σ) | ≤0.05°/hr |
| Gyro scale factor accuracy (1σ) | ≤50 ppm |
| Gyro accuracy (10 s, 1σ) | ≤0.1°/hr |
| Angular random walk (1σ) | ≤0.01°/√hr |
| Angular rate | ≥ ±400°/s |
| Angular acceleration | 100,000°/s² |
| Acceleration | ≥ 25 g |
| Startup time | ≤ 10 s |
| Alignment time | ≤ 15 min |
| Interfaces | 3 × RS-422 full-duplex, 1 × 100 M Ethernet |
| Speed accuracy (pure inertial) | ≤3.0 kn RMS |
| Speed accuracy (INS/GNSS) | ≤ 0.4 kn RMS |
| Position accuracy (pure inertial) | ≤4 nm/1 h CEP |
| Position accuracy (INS/DVL) | ≤0.6%D RMS |
| Position accuracy (INS/GNSS) | Better than satellite accuracy |
| Heading accuracy (pure inertial) | ≤0.5°·sec(L) RMS |
| Heading accuracy (INS/GNSS) | ≤0.1° RMS |
| Pitch & roll accuracy (pure inertial) | ≤0.05° RMS |
| Pitch & roll accuracy (INS/GNSS) | ≤0.02° RMS |
| Power consumption | ≤15 W |
| Dimensions (L×W×H) | 110×110×100 mm |
| Weight | ≤1.7 kg |
| Operating temperature | -40℃ – +60℃ |
| Shock | 15 g half-sine, 11 ms |
| Supply voltage | DC 24 V ±25% |
| Vibration | 20–2000 Hz, 6.06 g |
| MTBF | ≥ 20,000 hours |
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