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2 ST4000+ Wheel & Tiller Autopilots: Owner’s Handbook
1 Introduction
1.2 Extended systems
The ST4000+ is compatible with all other SeaTalk instruments.
You can connect it to additional fixed or handheld SeaTalk autopilot
control units located at secondary steering and control positions
(see page 52).
You can also use the ST4000+ autopilot with any navigator
(GPS, Decca, Loran) or wind instrument that transmits data in the
internationally-accepted National Marine Electronics Association
(NMEA) 0183 format.
The ST4000+ can display SeaTalk and NMEA instrument data in a
user-defined selection of data pages. When you are using the
ST4000+ to repeat instrument data, it shows a ‘pop-up’ pilot page for
5 seconds whenever you make a change in autopilot control.
The ST4000+ can share all data transmitted from SeaTalk
instruments:
• it can use wind information from a SeaTalk wind instrument for
wind trim steering in Wind Vane mode without the need for a
separate vane
• it can use track information from a SeaTalk navigation instrument
to provide waypoint control in Track mode
• it can use boat speed from a SeaTalk speed instrument to optimize
track-keeping performance
Rudder position sensor (wheel drives only)
On wheel drive systems you can fit a rudder position sensor to
improve the wheel pilot’s performance (see page 81). This is
particularly advisable if your boat’s steering system has significant
backlash, or you require optimum performance from a mechanical or
cable steering system. By using the information from the rudder angle
sensor, the ST4000+ will also be able to show the true rudder angle in
Standby and Auto modes.
Note: You MUST add a rudder position sensor if fitting the ST4000+
to a hydraulic steering system.