Sitex SP38 Autopilot, Инструкция по установке и эксплуатации

Страница: 99 / 162

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