Raymarine ST60 Tridata Owner's Handbook Manual - Linearization
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ST60 Compass Instrument Owner’s Handbook
Linearization
The Fluxgate Compass transducer must be linearized to compensate for
deviation. Linearization should be carried out in calm conditions, preferably in flat
water.
Note:
If linearization has already been performed, press the
disp
key momentarily to by-
pass the linearization process and carry on to the Heading alignment screen without dis-
turbing the current deviation settings.
When the Linearization screen is first selected, the outer segments of the LCD
cycle to indicate that linearization has started.
To proceed with the linearization, slowly turn the vessel in a circle, so that the
speed is kept below 2 knots and so that it takes at least 3 minutes to complete
360°. If the vessel is turning too quickly, the buzzer will sound and a SLO
message will flash on the digital display. If this occurs, slow down the vessel’s rate
of turn.
Keep turning until the digital display shows a flashing heading value.
Linearization is now complete and the digital display now advances
automatically to the Heading alignment screen.
Note the analog pointer reading which shows the amount of deviation corrected.
If this reading exceeds 15°, the Fluxgate Compass transducer should be re-sited.
Heading alignment
Carry out heading alignment as follows:
1. Align the vessel with a known bearing; preferably a transit bearing.
2. Use the
and
>
keys to adjust the value on the ST60 Compass instrument dig-
ital display until it corresponds to the known bearing.
Lock mode
The locked mode screen enables you to select which heading is selected as the
normal operating display in locked mode. This can be either:
• The locked or ‘fixed’ heading.
or
• The live or ‘current’ heading.
Use the
and
>
keys as necessary, to select the required heading. Select:
• F for Fixed heading.
• C for Current heading.