Sitex SP38 Installation and Operation
Basic Operation
Document PN
29010101
V2r0
- 9
8
-
Because of this confusion, the
SP38
’s handling of XTE can be switched from
“Norm” (normal) to “Rev” (reverse). In “Norm”, the autopilot will respond normally to the sense
of the cross-track error. In “Rev”, the autopilot will respond in the opposite way in response to
the same information.
Max Correction
When activating pre-stored routes with a large amount of initial cross track error, the autopilot
will steer the boat at almost 90° to the track, in order to get back on track as fast as possible.
In certain circumstances, this can appear as though the vessel is moving away from the
desired waypoint. Setting Max Correction to something less than 90° can minimize this
phenomenon, yet will get you back on track less quickly.
Commanded Heading Displayed
The commanded heading shown on the display in NAV mode may not be the same as the
bearing given by the Navigation System. This is because there are three different methods
that the
SP38
can use to process and react to the navigation data from the Navigation
System. You select which method you want the
SP38
to use by specifying “XTE”, “CTS”, or
“Both” for the “Correction” parameter in the Nav menu.
Correction set to CTS – Steering a Direct Bearing
In this method, Cross-Track Error is not factored into the calculation that the
SP38
uses to determine the heading to steer. The autopilot therefore steers directly
to the destination waypoint, as depicted in
Figure 49
:
Figure 49 – Steering with Correction set to CTS
Summary of Contents for SP38 Autopilot
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