Furuno's high-grade satellite compass provides superior heading accuracy for AIS, ECDIS, Radar and more

Provides highly accurate heading data for autopilot, radar, AIS, Sonar and plotting systems

IMO MSC.116(73) type approved as a verified THD (Transmitting Heading Device) with high accurate °æ0.6°f¢

Rapid 45°f¢/s follow-up rate greatly exceeds IMO High Speed Craft requirements 20°f¢/s

High accurate GPS, WAAS Data

SOG, COG, ROT, and L/L

High Contrast 4.5" Silver Bright LCD

Precision Pitch/Roll Data in Analog and Digital formats for vessel stabilizers, sonar, etc.

Multiple High Speed Heading Data Output in IEC 61162-1/2 (NMEA0183/HS)°·100% free of yearly or regular maintenance

No Recurring Costs

Unique Tri-Antenna System improves system accuracy and reduces the effects of yaw, pitch and roll

With the SC-110, a ship's heading is determined by decoding the phase data in the GPS carrier frequency. In principle, a pair of antennas A1(ref) and A2(fore), each connected with an associated GPS engine and processor, are installed along the ship's fore-aft line. The GPS systems at A1 and A2 calculate the range and azimuth to the satellite.

The difference in range between A1 and A2 is ßQ•Î + n where •Î is 19 cm and n* is automatically found during the initialization stage. A fraction of a carrier wavelength, ßQ•Î , is processed by Furuno's advanced kinematic technology in geographical survey, thus determining a vector (range and orientation) A1 to A2, i.e., heading of ship relative to north.

In reality, a third antenna is added to reduce the influence of pitch, roll and yaw, and five satellites are used to process 3D data (by 3rd sat), to reduce clock-derived error (by 4th sat), and to calculate n in the initial stage (by 5th sat).

If GPS signal is blocked by a tall building or the vessel is under a bridge, the 3-axis vibrating-gyro rate sensors in the processor unit take the place of the satellite until all five satellites are in view. The rate sensors also contribute to regulating the heading data against pitch, roll and yaw together with the third antenna (A3 in the illustration). *Ambiguity "n" is resolved by LAMBDA algorithm developed by Prof. Teussen, Delft University of Technology, The Netherlands.