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 TM 55-1905-220-14-2
2-61.
AUTOMATIC STEERING.
a. Automatic steering uses a gyropilot computer to steer the vessel on a predetermined course in both calm
and rough seas. In rough seas allowances can be made for yaw and rudder response.
b.
Prior to commencing automatic steering the normal steering procedure should be performed.
(1)
The POWER AVAIL lamp (1) is lit.
(2)
The PUMP RUN lamp (2) is lit.
(3)
Place STEERING SELECTOR (3) in the AUTO position.
(4)
Rotate HEADING SELECTOR (4) until the desired heading is shown on scale (5).
(5)
Set the AUTOMATIC STEERING ADJUSTMENTS as required.
(a) INTEGRATOR switch (6).
ON - Computes a continuous average heading error signal.
RESET - Resets integral function. When heading changes greater than 10are made, the
switch should be in the RESET position. This prevents overshooting the new course and then
switch returned to ON.
(b) WEATHER ADJ potentiometer (7).
Controls the sensitivity, amount of heading error permitted before the rudder ratio is increased.
Zero degrees (0 setting provides maximum sensitivity. In calm seas set to zero degrees (0
)
)
for best course keeping.
In rough seas, (considerable yaw), set to the approximate number of degrees of yaw motion from
the base heading.
(c) RUDDER MULTIPLIER potentiometer (8).
1.0 minimum rudder ratio.
3.0 maximum rudder ratio.
The higher setting causes the ship to respond more quickly to course error by ordering larger
rudder angles.
(d) RATE MULTIPLIER potentiometer (9).
1.0 minimum sensitivity (50% of maximum).
2.0 maximum sensitivity.
Controls sensitivity to changes in heading.
(e) RUDDER LIMIT potentiometer (10).
Sets limits of rudder movement, right or left, between 5 and 45 degrees.
2-461
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