Use the following process to initiate DCT steering:
1. Ensure that you have depth reading on the panel or on a separate depth instrument.
2. Steer the boat to the depth you want to track, and in the direction of the depth contour.
3. Activate AUTO mode, select depth contour steering and monitor the depth reading.
4. Select the port or starboard option in the turn dialog 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)
The following parameters are available for depth contour tracking:
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 takes a long time to compensate for drifting off the set depth
contour, and the autopilot fails to keep the boat on the selected depth.
If the value is set too high, the overshoot increases and the steering is unstable.
Contour Cross Angle (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 lazy-s
movements.
The larger the CCA, the bigger yawing is allowed. If you the CCA set to zero there are no lazy-
s movements.
Using the NSO evo2 in an AP24/AP28 system
Command transfer
If your NSO evo2 is connected to an autopilot system including an AP24 or AP28 control unit,
only one control unit can be active at the same time. An inactive control unit is indicated
with a square with a cross symbol in autopilot controller pop-up.
You take command from an inactive control unit by selecting the mode in the autopilot pop-
up, and then confirming active mode.
Locking remote stations
The AP24/AP28 includes a Remote Lock function that disables autopilot control from other
units. A locked control unit is indicated with a key symbol in autopilot controller pop-up.
When the remote lock function is enabled on an AP24/AP28 control unit, only the active
control unit stays in command. No transfer of command to NSO evo2 or other autopilot
control units on the system can take place.
Autopilot | NSO evo2 Operator Manual
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