Ship Gyrocompass Connection
The ship's gyrocompass provides true heading input to the antenna allowing the antenna to target and acquire
the desired satellite. Intellian always recommends connecting a ship's gyrocompass to the antenna using the
gyrocompass interface on the BDT. If the ship's gyrocompass output is other than NMEA 0183 or NMEA 2000,
the purchase of an NMEA converter may be required. THDs (Transmitting Heading Devices) that are approved for
carriage on certain classications of a vessel or a GPS compass with a compatible NMEA output and heading
sentence can be also used.
Recommended Cable
• NMEA 0183 Gyrocompass Interface Cable (Customer supplied)
• Connector Type: 2 conductors for NMEA 0183, Mini-C 5 pin for NMEA 2000
• NMEA heading sentence: xx HDT (4800 Baud, 8, N,1) If there is no HDT sentence then use HDM sentence
instead.
• NMEA 2000 heading PGN Number = 127250 (Vessel Heading)
Strip the cable insulation back 5mm (0.2")
Do not solder the cable
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