User guide

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Software setup | Zeus Installation Manual
rudder from continuous hunting. A deadband will cause inaccurate steering.
 Note: The rudder deadband setting is not available when the autopilot is con gured for
Virtual Rudder Feedback.
Seatrials
A seatrial can only be performed if the dockside settings are completed and con rmed.
The seatrial must always be performed in open waters at a safe distance from other tra c.
 Note: You can switch the autopilot to standby mode and take manual control of the boat at
any time during the seatrial by pressing the ‘STBY/AUTO’ key.
The following seatrial calibration should be done:
• Compass calibration; used to automatically compensate for on-board magnetic interference
• Compass o set adjustment, used to compensate for a  xed o set in the  nal heading
readout
• Wind vane o set to compensate for a wind vane that is not mounted facing in exactly the
same direction as the bow of the vessel (dead ahead)
• Boat speed calibration
• Transition HI/LO speed setting (the speed at which you want to change the set of steering
parameters)
• Automatic tuning of the steering parameters
• Setting the seastate  lter
• ‘Saiboat Setup’ menu items
Compass calibration
Before the compass calibration is started, make sure that there is enough open water around
the vessel to make a full turn.
The calibration should be done in calm sea conditions and with minimal wind to obtain good
results. Follow the on-screen instruction, and use about 60-90 seconds to make a full circle.
During the calibration, the compass will measure the magnitude and direction of the local
magnetic  eld.
• If the local magnetic  eld is stronger than the earth’s magnetic  eld (the local  eld is reading
more than 100 %), the compass calibration will fail
• If the local  eld is reading more than 30 %, you should look for any interfering magnetic
objects and remove them, or you should move the compass to a di erent location. The
(local)  eld angle will guide you to the local interfering magnetic object.
 Note: Calibration must be made on the compass that is active for the autopilot. If the
compass is not possible to initiate calibration from the device list on the Zeus, refer to the
compass’ own instructions regarding calibration.
 Note: In certain areas and at high latitudes the local magnetic interference becomes more
signi cant and heading errors exceeding ±3° may have to be accepted.
Compass mounting o set
After compass calibration, the di erence (if any) between the compass lubber line and the
boat’s center line should be compensated for.
1. Find the bearing from the boat position to a visible object. Use a chart or a chart plotter
2. Steer the boat so that the center line of the boat is aligned with the bearing line pointing
towards the object
2. Change the o set parameter so that the bearing to the object and the compass readout
becomes equal. Refer graphic above
 Note: Make sure that both the compass heading and the bearing to the object have the same
unit (°M or °T).