Chapter 4: Commissioning the Autopilot 8-4-9
ST290 Instrument System Owner’s Handbook
4.3 Seatrial Calibration
When you have completed the dockside calibration, you must then
complete the setupby carrying outa shortseatrial, usingthe PilotSeatrial
Calibration mode. There are two stages in the Seatrial.
1. Compass calibration:
• Setting automatic deviation correction.
• Aligning the compass heading.
2. Optimizing the autopilot to your boat:
• Automatically, using an AutoLearn function, on 150G and 400G
autopilot systems.
• Manually on T150 and T400 (non-GyroPlus) autopilot systems.
Note: For more information about pilot calibration, refer to Section 8,
Chapter 5 of this handbook.
Seatrial safety
IMPORTANT
You can return to hand steering at any time during the seatrial by
pressing
STANDBY, on the Pilot Keypad.
To ensure the seatrial is carried out safely and that results are valid, you
should perform the initial seatrial only:
• When you have successfully completed the dockside calibration.
• In waters that are clear of any obstructions with plenty of clear space
to maneuver.
• In conditions of light wind and calm water, so you can assess
autopilot performance without the influence of strong winds or large
waves.
Before you start your seatrial, ensure you have switched on thenecessary
ancillary equipment, such as a GPS (to provide course over ground
(COG), speed over ground(SOG) and latitude (LAT) data),or a speed log
(to provide speed through the water). This information will help the
autopilot achieve best performance.
EMC conformance
Always check the installation before going to sea to make sure that it is
not affected by radio transmissions, engine starting etc.
81183_2 S8.book Page 9 Tuesday, May 6, 2003 9:08 AM
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