Raymarine autopilot control unit - Manual (Page 34)

Chapter 3: Advanced Operation 17
Chapter 3: Advanced Operation
This chapter provides information on:
• Operation in Track mode.
• Operation in Wind mode (WindTrim).
• Adjusting the response level and rudder gain.
• Alarms.
3.1 Operating in Track Mode
Track mode is used to maintain a track between two waypoints created
on a GPS, Decca, or Loran navigation system. The autopilot will then
compute any course changes to keep your boat on track, automatically
compensating for tidal streams and leeway.
The ST7000 Plus can receive cross track error (the distance your vessel
is from a planned track) from:
• A SeaTalk navigation instrument or chartplotter
or
• A non-SeaTalk navigation system transmitting data in the
NMEA 0183 format – this can be connected directly to the ST7000
Plus NMEA input, as described in Chapter 5, Installation.
Track mode is selected by pressing the track key, but can only be
selected from Auto mode. You can return to either Auto or Standby
mode from Track mode, as follows:
• Press auto to leave Track mode and return to Auto mode.
• Press standby to leave Track mode and return to manual steering.
Note: The ST7000 Plus control head can be programmed to display
various pages of navigation data, such as
XTE, BTW etc. Please refer to
Chapter 4 for details.
Initiating Track Mode
When initiating Track mode, the track can be acquired in one of two
ways:
• Automatic acquisition, when cross track error and bearing to
waypoint data are available.
• Manual acquisition, when cross track error is the only available
data.
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