SailNet Community - View Single Post - gps + autopilot
Thread: gps + autopilot
View Single Post
Old 05-07-2006
sailandoar's Avatar
sailandoar sailandoar is offline
Senior Member
Join Date: Mar 2006
Location: Cape Fear, NC, USA
Posts: 208
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 9
sailandoar is on a distinguished road
No problems

(1) NMEA is supported. If there is anything in the NMEA vocabulary that is not included you will probably not miss it. Sea talk is there if you need it (probably NOT)

FROM: ST1000 Plus & ST2000 Plus Tiller Pilots - Owner’s Handbook

Information on NMEA 0183 data words:
Cross Track Error:: APB, APA,RMB, XTE, XTR
Bearing to Waypoint:: APB, BPI, BWR, BWC, BER, BEC, RMB
Distance to Waypoint:: WDR, WDC, BPI, BWR, BWC, BER, BEC, RMB
Speed Through Water:: VHW
Apparent Wind Angle and Speed:: VWR


Go to the owners manual for the pinout. It will be 3-wire (a) common (12V ground) (b) Data in (recieve) , (c) Data Out (transmit).

Get the common correct and the rest will fall into place. You can't hurt anything switching the data wires so just give it your best educated guess and then switch the data wires if that does not work. Serial communication has some issues with terminology that constantly causes confusion so don't feel bad.

Example: Equipment is divided into two types DTE and DCE and between them you connect trans-a <=> recieve-b and recieve-a <=> trans-b, HOWEVER if the items are both DTE or DCE you then have to cross-over the two data wires.... i.e. transmit<=>transmint // receive<=>receive. They labels are just words so don't let them throw you.
DTE - Data Terminal Equipment
DCE - Data Communication Equipment

Most any GPS will work, just set the communication protocol to NEMA.
Comments about 'seatalk only' do apply to the older units but anything inthe last 5-8 years will talk NMEA.

Last edited by sailandoar; 05-07-2006 at 08:07 PM.
Reply With Quote Share with Facebook