92 ST4000 PlusWheel & Tiller AutopilotsOwner’sHandbook9. Press and hold standby for 2 seconds to exit calibration and savethe new settings.Note: Setup options are always saved on exit.Further heading alignment adjustmentYou should always check the compass alignment after swinging thecompass. However, once the initial deviation correction procedure hasbeen performed, you can make adjustments to the alignment as often asyou wish, without swinging the compass again.Although the compass deviation correction procedure removes most ofthe alignment error, you will probably be left with small errors (of theorder of a few degrees) that will vary depending on the heading.Ideally, you should check the heading reading against a number ofknown headings, plot a deviation curve, and determine the headingalignment value that will give the lowest average alignment error. Thisvalue can then be entered on the Heading Alignment screen, asdescribed above.If the average heading error is more than 5∞, you should perform thecompass deviation correction procedure again, circling slower and inmove favourable conditions.Checking autopilot operationHaving calibrated the compass the following proceedure isrecommended to familiarise yourself with autopilot operation:1. Steer onto a compass heading and hold the course steady.2. Wheel Pilot: Engage the wheel drive clutch by rotating the wheeldrive clutch lever clockwise.Tiller Pilot: Place the actuator over the tiller pin. If necessary,
