Available as:
  • Rental
  • Sale (ex rental)

VT TSS MAHRS System – Available for rental, hire and ex-rental purchase from Ashtead Technology.

MAHRS is a master heading reference instrument employing the characteristics of a dynamically tuned Gyro (DTG), as well as the effect of gravity and the earth's rotation to produce a true north reference. The DTG provides exceptional heading performance on almost any vehicle to a level unmatched by even the latest fibre optic designs. This is combined with TSS Dynamic Motion Sensor (DMAS) to provide very accurate heave, roll and pitch.

MAHRS features a unique new algorithm that closely couples the motion sensor and gyrocompasses. Deck plane correction enables real-time correction of the heading solution during vessel dynamics.

Key features

  • 0.03ᄚ roll and pitch accuracy
  • 0.1ᄚ heading accuracy
  • Attitude and heading in all dynamics

Technical specifications

Settle point error±0.1° RMS secant latitude
Static error±0.05° RMS secant latitude
Dynamic Accuracy±0.1° RMS secant latitude
Settle point repeatability±0.1° RMS secant latitude
Follow-up speed200° / second
Settling time<45 minutes within 0.7°
Gimbal limits45° pitch and roll
Digital Outputs2 serial ports, RS232 or RS422, baud rates 1200, 2400, 4800, 9600, 19k2, 38k4
Data output rateDigital - up to 200 Hz
Analogue - 500 Hz (heave, roll and pitch) - optional
Ambient operating temperature-10°C to +55°C
Power requirement24V DC, 5A at switch on, 2.5A operating
CompensationLatitude: 80N to 80S
Speed: 0 - 90 knots
Pitch and rollResolution: 0.01°
Range: ±90°
Pitch and Roll accuracy0.03° (for a 5° amplitude)
0.05° (for a 45° amplitude)
Heave5cm or 5% whichever is greater (period 0 to 20s)
Shock (survival)10g


242 x 430 x 232 mm9.5 x 16.9" x 9.1""20 kg44 lbs