Table of Contents
Advertisement
Section
.
The
vessel should
of error such as steel bridges or large ships, and
, sources
in calm water.
MAKE SURE THE TRANSIT SCREW HAS BEEN
LOOSENED OR REMOVED FROM THE COMPASS
SENSOR BASE.
Power up the system and check that the displayed head-
*
ing agrees approximately with the known ship's heading.
Check this approximate agreement through
to see that the display follows correctly and that the
fully
system is
operational and no wiring errors exist.
.
The TeIeflex AP2577 compass sensor is able to correct
.
for deviations up to a maximum of 45 degrees. However,
in extreme cases, residual errors are likely to remain after
The
correction.
larger
the
accurate
final correction.
Note: Initial deviations greater than
affect autopilot steering performance
.
heading display inaccurate.
AUTOMATIC DEVIATION CORRECTION
PROCEDURE
.
The actual correction routine starts when the vessel
.
passes
and continues
.
board turn. Make a smooth
.
2
minutes. With a twin engined craft, use the engine
to
controls
spin the boat. With
hold
the wheel or tiller in place and adjust the engine
to
a
speed
give
circle approximately
a
in diameter at
speed
the
vessel to make at least one complete turn before you
start the calibration. This ensures the vessel is being
turned at constant speed.
.
Maintaining
constant turning speed is esential
a
U s e
, results.
constant amount
a
.
with relatively calm conditions. Tide will
.
but
excessive wind or swell
results
.
be
well away from any potential
the
initial deviation, the less
10
and
through
a
turn that lasts
a
single engine
50
8
or 5 knots. Allow
of
about
kph
of
helm
may
be
360
degrees
degrees may
will make the
360
Star.
degrees
1 and
between
boat,
160
metres or
feet
for good
and
engine speed
not
affect the
cause
large errors.
Installing
the
Autopilot
I
I
Advertisement
Table of Contents
