It is recommended to turn on the AP Depth Data Missing alarm
when using DCT. When this alarm is activated an alarm will be
raised if the depth data is lost during DCT.
To initiate a DCT turn
• Steer the boat to the depth you want to track, and in the
direction of the depth contour
• Activate auto mode, then select depth contour tracking while
monitoring the depth reading
• Select the port or starboard button to initiate the depth contour
steering to follow the bottom sloping to starboard or to port
Port option
(depth decreases to port)
Starboard option
(depth decreases to starboard)
Turn variables
• Ref. depth: this is the reference depth for the DCT function. When
DCT is initiated the autopilot reads the current depth and set this
as the reference depth. The reference depth can be changed
when the function is running
• Depth gain: this parameter determines the ratio between
commanded rudder and the deviation from the selected depth
contour. The higher depth gain value the more rudder is applied.
If the value is too small it will take a long time to compensate for
drifting off the set depth contour, and the autopilot will fail to
keep the boat on the selected depth. If the value is set too high
the overshoot will increase and the steering will be unstable.
• CCA: the CCA is an angle that is added to or subtracted from the
set course. With this parameter you can make the boat yaw
around the reference depth with s movements. The larger the
CCA the bigger yawing will be allowed. If the CCA is set to zero
there is no S-ing.
Autopilot | GO XSE/XSR Operator Manual
83
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