SG Brown/TSS Meridian Surveyor Gyrocompass

SG Brown/TSS Meridian Surveyor Gyrocompass – Available for rental, hire and ex-rental purchase from Ashtead Technology.

The Meridian Surveyor boasts a wide range of interfaces to enable use on any marine vessel. The unit utilizes a DTG Gyro element which provides exceptional performance with accuracy unmatched by even the latest fibre optic designs. Unlike conventional spinning mass Gyrocompasses, the Meridian Surveyor used a dry tuned element (DTG) that removes the need for routine maintenance.

The Meridian Surveyor provides reliable, maintenance free operation with a MTBF in excess of 30,000 hrs. The remarkable stable heading can be maintained for turn rates in excess of 200° per second making the system ideal for use on fast survey craft and in river/harbor environments.

The Meridian Surveyor GyroCompass rents with Operators handbook, Spare fuse, Connector kit and Carrying Case.

Key features

  • Start up power requirement of 1.8A
  • IMO, Wheelmark & HSC certified
  • Innovative chassis design incorporating state-of-the-art digital electronics for improved reliability
  • <40 minutes settlling time
  • Small, lightweight and versatile
  • Dynamic heading accuracy of 0.6ᄎ
  • Static heading accuracy of 0.1ᄎ
  • Multiple analogue and digital outputs
  • Gyro element design ensures low cost of ownership
  • MTBF of 30,000hrs
  • High turn rate of 200ᄎ per second

Technical specifications

Display360° Compass Card and Digital Display
Settle Point Error0.1° secant latitude
Static Error0.05° secant latitude RMS
Dynamic Accuracy0.2° secant latitude
Settling Time<40 minutes, to within 0.7°
Follow up speed200°/ sec
StandardsIMO A 424 (X1), IMO A 821 (1bv9), BS EN 60945, BS EN ISO 8728. 1994, BS 6217. 1981 CE Marking, Electromagnetic Compatibility (EMC) Directive
S type output1 x Step by Step (5V TTL), six steps per degree
Synchro output1 x 26V 400Hz Sector Value 3600(1:1 ratio) 11.8V line to line
Serial Data11 x RS 422, NMEAO163 5 x RS 232, NMEA 0163 1 x Printer Port, NMEA 0183 1 x R.O.T. i 200/sec. (I 1OV)
Status/Alarm5V TTL power fail/gyro fail 5V TTL system ready
Latitude InputAutomatic: NMEA 0183 via RS232 or RS422 from GPS or manual
SpeedPulse or contact closure at 100, 200 or 400 per NM trom Log NMEA 0183 via R5232 or R5422 from Log
Latitude Compensation80°N to 80°S
Speed0 - 90 knots
Ambient Operating Temperature0°C to 45°C, -15°C + 55°C (with reduced accuracy)
Storage Temperature-25°C to + 80°C
Gimbal Limits+ 45° Pitch and Roll
Mean Time Between Failure30,000 hours
Input Voltage24 VDC (18 - 36 VDC)
Start Up1.8A on start up
Standards1M0A424 (Xl), 1M0A821 (19), BS EN 60945, BS EN ISO 8728.1994, BS 6217.1981


344mm (H) x 267 mm (W) x 440mm (D)13.5 x 10.5" x 17.3""15.5 kg34.2 lbs