Raymarine St290 Specifications Page 78

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3-3-2 Section 3: Using Analog Instruments
ST290 Instrument System Owners Handbook
.
Note: If your ST290 system is connected to a Raymarine autopilot oper-
ating in Auto, Vane or Track mode, the ST290 Compass instrument is
forced to operate in Auto mode. In this mode, all ST290 Compass instru-
ment button functions, except illumination, are disabled.
Switch on
When power is first switched on, the Compass instrument is in unlocked
mode. The current heading (true or magnetic) is displayed on the digital
display and the analogue pointer indicates zero.
Digital display
In addition to showing the course heading or the locked heading, (see
Table 3-1 , the digital display can also show:
Course Over Ground (COG), or
Average Heading.
Procedures
Figure 3-2 shows the button functions. Use this information, in
conjunction with the information inFigure 3-3 to operate your ST290
Compass instrument.
The displayed heading is either true or mag(netic) as indicated by a
black square marker adjacent to the corresponding legend.
Table 3-1: Compass instrument indications
Mode Pointer indication Digital display
Unlocked Zero. Current course heading (true or
magnetic.
Locked Course error from locked head-
ing, to a maximum ±30° devia-
tion.
Locked heading.
Auto
(see Note below)
Autopilot course error. Autopilot locked heading.
81183_2 S3.book Page 2 Tuesday, May 6, 2003 8:41 AM
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