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 TM 55-1905-220-14-7
3-216. HEADING SELECTOR - MAINTENANCE INSTRUCTIONS (Cont).
LOCATION
ITEM
ACTION
REMARKS
INITIAL CHECK-OUT
7. Heading
After the Heading Selector has been installed and
Selector
all connections have been made, proceed with the
following:
a. Start the gyrocompass and wait for it
to settle.
b. Set HEADING SELECTOR control to same head-
ing as that indicated by gyrocompass card.
c. Energize the steering equipment and position
the rudder to amidships. Place control equip-
ment in the gyrocompass mode.
d. Set HEADING SELECTOR control first to the right,
then to the left of the actual heading as indi-
cated by the gyrocompass card. The rudder
should move so as to turn the vessel toward
the ordered headings.
e. If the rudder does not respond properly in
Step d, turn the HEADING SELECTOR control
to the point that the rudder stops at amid-
ships. When the rudder cannot be positioned
with this control, check the steering equip-
ment. When no problem is found with the
steering equipment, check the HEADING SELECTOR
alignment.
ALIGNMENT
8. Heading
After any repair has been made to the Heading
Selector
Selector, perform the initial check-out procedure.
The actual heading may be slightly different
from the ordered heading when the rudder is at
amidships. This difference can be eliminated by
aligning the heading selector synchro as follows:
a. Remove the heading selector from the
enclosure.
b. Start the gyrocompass and wait for
it to settle.
3-3332
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