Chapter 3: Compass Instrument 3-3-5
ST290 Instrument System Owner’s Handbook
Figure 3-5: Locked mode operation
When you leave locked mode, the average error flashes on the digital
display for 5 seconds. Negative values are given for errors to port and
positive value for errors to starboard. If you press the LOCK button again
within this 5 secondperiod,you re-enterlockedmodewith thepreviously
stored heading as the locked heading.
The average course error is reset to zero whenever the locked heading is
changed.
Auto mode
The auto mode is activated automatically when the ST290 system is
connected to a SeaTalk compatible autopilot.
Locked
heading
This is either the current
course or locked heading
(select in User calibration)
Heading
Average
course
error
(flashing)
(flashing)
To enter locked mode
Press
5 second
timeout
to decrement
locked heading
to increment
locked heading
To retrieve previous locked heading,
press LOCK while value is flashing
Unlocked mode
To leave locked mode press
5 second
timeout
Press
Press
D5550-1
81183_2 S3.book Page 5 Tuesday, May 6, 2003 8:41 AM
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