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54 ST4000+ Wheel & Tiller Autopilots: Owner’s Handbook
5 Installing the ST4000+
Note: If you need to connect more than one item of NMEA equipment,
you will need to connect one of them to the SeaTalk system using a
SeaTalk/NMEA Interface (part number: E85001).
NMEA data formats
TheST4000+ can decode the following NMEA 0183 navigation and
wind data:
Transmitting NMEA data
Transmitting NMEA data on SeaTalk
If the ST4000+ receives any of the NMEA data shown above, and the
equivalent data is not present on SeaTalk, it will transmit the data onto
SeaTalk to make it available to other SeaTalk instruments:
• the ST4000+ transmits depth information in the units defined by
the first page in the data page rollover
• the ST4000+ always transmits water temperature in °C
Transmitting NMEA data to NMEA equipment
If you want to transmit information to NMEA equipment, you will
need to connect a SeaTalk/NMEA Interface (part number: E85001)
to the SeaTalk bus to convert SeaTalk data to NMEA data.
Information NMEA 0183 data
Course Over Ground VTG, RMC, RMA
Speed Over Ground VTG, RMC, RMA
Cross Track Error APB, APA, RMB, XTE
Bearing to Waypoint APB, BWR, BWC, RMB
Distance to Waypoint BWR, BWC, RMB
Waypoint Number APB, APA, BWR, BWC, RMB
Apparent Wind Speed VWR, MWV
Apparent Wind Angle VWR, MWV
Speed Through Water VHW
Depth DBT
Water Temperature MTW
Note: The autopilot only decodes the last four characters of waypoint names.
This means that the last four characters of long waypoint names must be
unique for the waypoint advance function to work.