Sitex SP38 Autopilot, Installation And Operation Manual

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Sitex SP38 Installation and Operation Basic Operation
Document PN 29010101 V2r0
- 9 5 -

Turn on your Navigation System and activate a waypoint.

Press the NAV button on the Control Head until the letter “N” appears in the upper
left portion of the display, indicating NAV mode has been initiated (
Figure 47
).

The Waypoint ID, Range, Bearing, and cross-track error (XTE), as provided by the
Navigation System will be shown on the Control Head display.
NOTE: some Navigation Systems do not provide all of this information. In such cases, the
display will show dashes ( - - - ) or “NONE” in place of any missing data.
Figure 47 – Typical NAV Mode Screen (Normal Display)
In NAV mode, you can quickly “dodge” around obstacles, and automatically return to your
original Track. See the 5.6 Dodge and Jog Lever Turns sections for more information.
You can limit the maximum amount of rudder travel in NAV mode by turning on the Auto/Nav
rudder limits. Turning them on, and adjusting them to suit, is done in the Power Steer menu.
The
SP38 has an automatic Off-Course Alarm that will be activated should the vessel fall off
the commanded course in NAV mode, by more than 20°. There is a 32 second delay on this
alarm.
NAV Mode
In NAV mode, the SP38 Advanced Autopilot system can use steering information from an
external NMEA 0183 Navigation System, to steer to a destination, or along a route of
waypoints leading to a final destination.
In NAV mode, the
SP38 uses its own compass (or the Navigation System) as its primary
source of heading for course keeping, while the steering data received from the Navigation
System is used to calculate the commanded heading to the destination or next waypoint.
To activate NAV mode: