Autohelm
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Autohelm
SeaTalk Service Manual
20
message indicates the ST6000 is receiving data recognised as NMEA but has an
invalid flag set. This is normally due to the receiver having a low signal strength or a
high noise figure.
5.4 Autohelm 6000 NMEA 0183 data input format
The 6000 must receive Cross Track Error data at least once every 30
seconds.
If a display of Waypoint Bearing, Distance or Number or the Waypoint
advance facility is required then this information must be received at
least once every 30 seconds.
All NMEA data is read into a buffer thus enabling the 6000 to cope
with delays between characters and delays between sentences.
All Talker identifier characters, ie RA, DE, LC etc. are ignored allowing
interface with any type of equipment so long as the sentence type is
one of the following :-
Apparent wind speed and angle can be received from any external equipment
transmitting the N.M.E.A VWR header. The ST6000 will only display apparent wind
angle but will convert and retransmit both apparent wind speed and direction on the
seatalk bus. This information can then be displayed on an ST50 wind instrument
acting as a repeater.
Track
Control
Bearing to
Waypoint
Distance to
Waypoint
Waypoint
Number
Apparent Wind
Speed and Direction
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