Sitex SP38 Installation and Operation
Document PN
29010101
V2r0
- 6
9
-
4. Start with “Rudder Gain” and “Counter Rudder” set to the factory defaults (for Hi): 5
and 3.
5. Highlight “Seastate” and set it to 1.
6. Highlight “Turn Rate.” Select a setting that is approximately ¾ of your boat’s
comfortable turning rate at a normal cruising speed (to find your “Comfortable
turning rate,” simply time a complete 360º circle while the vessel is performing a
safe yet tight turn, at the normal cruising speed. A “Comfortable turning rate” is
360° divided by the number of seconds it took to complete the circle).
7. Exit the Auto menu.
8. Switch to AUTO mode (before switching into POWER STEER, AUTO or NAV
modes, the rudder must be at the dead-ahead position). The autopilot will then
automatically take your current heading and use that as the Course to Steer.
9. Run for about 5 minutes. If the boat “esses” back and forth more than about 3
degrees, bring up the Auto menu and reduce the Rudder Gain setting by 1 step,
then test again.
Make a medium Heading change, say 15°– 20°, with the COURSE CHANGE knob.
Observe how the boat responds, as it turns and settles into the new heading:
If the boat stops turning before the new heading is reached and then approaches
it slowly, either increase the Rudder Gain by 1, or decrease the Counter Rudder
by 1.
If the boat overshoots the new heading, and then makes several turns back and
forth across the new heading before settling down (known as “essing” or
“overshooting”), either decrease Rudder Gain, or increase Counter Rudder by 1.
If the boat approaches the new heading, shies away, then approaches and shies
away again, decrease Counter Rudder by 1.
Continue making those medium heading changes, adjusting Rudder Gain and Counter
Rudder as needed, until the boat settles smoothly onto the new heading without
excessive overshoot.
You can leave the higher speed tests for later, if it is not safe to run at that speed where you
are doing your Sea Trials.
Adjust Turn Rate for Hi Speed
1. Adjust the Turn Rate setting to the full comfortable rate (per the previous step 6).
2. In AUTO mode, make a few course changes of 20° or more, to ensure that the
rate of turn is indeed comfortable at normal cruising speed; if it is not, reduce
the Turn Rate setting until it is.
Installation
Summary of Contents for SP38 Autopilot
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Page 15: ...Sitex SP38 Installation and Operation Document PN 29010101 V2r0 14 Introduction ...
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Page 35: ...Sitex SP38 Installation and Operation Document PN 29010101 V2r0 34 Installation ...
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Page 109: ...Sitex SP38 Installation and Operation Document PN 29010101 V2r0 108 Advanced Operations ...
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Page 123: ...Sitex SP38 Installation and Operation Document PN 29010101 V2r0 122 Care and Maintenance ...
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Page 127: ...Sitex SP38 Installation and Operation Document PN 29010101 V2r0 126 Appendices ...
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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 ...
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