The exact procedures vary with the equipment
installed. Some equipment has separate manual
current controls that should be preset so that they do not
have to be adjusted when the coils are switched to
manual operation. On equipment with common current
controls for automatic and manual operation before
switching to manual operation, adjust the control to zero
current (maximum CCW). When you adjust the current
on the operating equipment, consult the technical
manual furnished with the equipment for detailed
information.
Gyro-controlled AUTODEG Equipment
Operation
Like magnetometer-controlled equipment,
gyro-controlled AUTODEG equipment has two modes
of operation-automatic and manual.
AUTOMATIC OPERATION.-- When set up
for automatic operation, gyro-controlled equipment
will automatically make changes in coil currents
that are required because of changes in the ship's
heading. Gyro-controlled equipment will not
with the values specified in the degaussing folder for the
automatically make changes in coil currents that
ship's location. Magnitude and polarity of A- and FI-QI
are necessary when the ship changes its magnetic
coil currents will vary with the ship's heading. Monitor
these on cardinal headings or calculate them. Ensure
NOTE: Older equipment once automatically
that the FI-QI current is equal to the value specified for
changed coil currents to provide for compensation
the ship's location multiplied by the cosine of the ship's
of the ship's roll and pitch. This type of
magnetic heading angle and that the A-coil current is
equipment is now obsolete and has been
equal to the value specified for the location times the
converted to magnetometer control or removed from
sine of the magnetic heading angle.
service.
MANUAL OPERATION.-- Gyro-controlled
Automatic operation is the normal mode of
equipment has a provision for operator control of the A-
operation and consists primarily of energizing
the equipment, periodic monitoring for indications
or a fault in the control computer. Manual operation
of malfunction, and adjusting current controls as a
consists of the heading switch set for the ship's magnetic
ship moves from one H and Z zone to
heading and the H-zone switch set for the ship's
another. Gyro-controlled equipment, like
position. Since step inputs from the heading switch only
magnetometer-controlled equipment, is completely
approximate heading signals from the gyro and control
set up and adjusted when the ship's degaussing
computer, the ship's induced magnetism compensation
system is initially calibrated at the range. However,
during manual operation is not as good as that provided
some controls on this equipment must be set
by automatic operation. Consequently, manual
each time the equipment is energized. The
general procedure for automatic operation is as
operation should be used only when normal operation
follows:
is not possible.
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