Sitex SP38 Installation and Operation
Basic Operation
Document PN
29010101
V2r0
-
102
-
Figure 52 – Steering with Correction set to Both
When steering along a track, the
SP38
tries to minimize cross-track error by steering to a
heading that lies between the perpendicular to the track and the destination waypoint. The
farther you are off track, the closer to the perpendicular the heading will be. As you come closer
to the track, the heading of the vessel will change closer to the heading of the track. When you
are on-track, the vessel’s heading and the track heading will be identical.
The total number of degrees that the autopilot will correct the heading received from the
Navigation System as it tries to bring the vessel back on track is limited to the value set for “Max
Correction” in the Nav menu.
You can test out how well the
SP38
steers along a track by following these steps:
1)
Make sure the Navigation System is turned on and that a waypoint is programmed in.
Usually this means selecting a waypoint from a list and pressing the ”GOTO” button.
2)
Steer the boat close to the waypoint track.
3)
Put the
SP38
in NAV mode by pressing and holding the NAV button until the unit
beeps,
and the letter “N” appears in the upper left portion of the display.
4)
Observe the vessel’s response for several minutes (if the vessel seems to be
continually falling off course away from the track, change “XTE Sense” (cross-track
error sense) in the Nav menu from “NORM” (normal) to “REV” (reverse) and observe
any performance differences).
5)
Verify correct operation by steering back to the original track and then putting the
autopilot into NAV mode again.
6)
Observe the vessel’s response as before. If the vessel is wandering back and forth
but there are no alarms on the autopilot or Navigation System, the most common
cause is poor signal quality in the sensor or antenna wiring of the Navigation System.
This may be due to:
Improper grounding
Electrical noise generated in the vessel (alternators, power packs, etc.)
Poor antenna location
Refer to the Navigation System’s manual for signal quality measurements, and ideas on
making improvements.
Summary of Contents for SP38 Autopilot
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Page 14: ...Sitex SP38 Installation and Operation Document PN 29010101 V2r0 13 ...
Page 15: ...Sitex SP38 Installation and Operation Document PN 29010101 V2r0 14 Introduction ...
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Page 26: ...Sitex SP38 Installation and Operation Document PN 29010101 V2r0 25 ...
Page 35: ...Sitex SP38 Installation and Operation Document PN 29010101 V2r0 34 Installation ...
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Page 108: ...Sitex SP38 Installation and Operation Document PN 29010101 V2r0 107 ...
Page 109: ...Sitex SP38 Installation and Operation Document PN 29010101 V2r0 108 Advanced Operations ...
Page 110: ...Sitex SP38 Installation and Operation Document PN 29010101 V2r0 109 ...
Page 123: ...Sitex SP38 Installation and Operation Document PN 29010101 V2r0 122 Care and Maintenance ...
Page 124: ...Sitex SP38 Installation and Operation Document PN 29010101 V2r0 123 ...
Page 127: ...Sitex SP38 Installation and Operation Document PN 29010101 V2r0 126 Appendices ...
Page 128: ...Sitex SP38 Installation and Operation Document PN 29010101 V2r0 127 ...
Page 156: ...Sitex SP38 Installation and Operation Document PN 29010101 V2r0 155 Warranty ...
Page 157: ...Sitex SP38 Installation and Operation Document PN 29010101 V2r0 156 User Notes and Settings ...
Page 158: ...Sitex SP38 Installation and Operation Document PN 29010101 V2r0 157 ...