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 TM 55-1905-223-10
(c)
A receiving EOT must acknowledge a STANDBY order before it can issue a CANCEL
STANDBY order.
(d) If the port and/or starboard EOT are active, a FINISHED WITH ENGINES order may
be initiated only if both port and starboard EOTs have acknowledged BRIDGE CONTROL or STOP orders.
f.
Steering Control Panel The steering control panel is located on the pilothouse console. The panel
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provides system power selection, mode of operation including full followup (FFU) using the helm, non-followup
(NFU) using pushbutton switches on the panel, and AUTO (autopilot). The panel also contains an alarm panel
for each steering gear pumpset, alarm test switch, and cancel switch to silence the alarm. Rudder position
commands are input to the steering gear by movement of the helm or pressing pushbutton switches. These
input signals operate solenoid activated hydraulic control valves in the pumpset selected. The control valves
direct the flow of hydraulic fluid from the pumpset to power cylinders attached to the rudder tiller arms which
position the rudder. The steering control panel contains a rudder angle indicator that displays the actual rudder
position in degrees. A rudder order indicator below the panel displays a direct indication of the actual position
of the helm. The pumpset status panel includes two sets of six indicators which give information on the status
of each pumpset system. The green status lamps (POWER AVAILABLE, MOTOR RUN) intensity is adjustable
by a DIMMER control. The remainder of the status lamps are activated by alarm sensors and remain on after
the alarm horn has been canceled, and until the fault is cleared. The NFU pushbutton switches operate relays,
which in turn operate the pumpset solenoids until released. The rudder will then remain stationary to the
position commanded. When in FFU or AUTO mode, the NFU pushbuttons control the rudder to move in the
direction commanded as long as the pushbuttons are depressed. Upon releasing a NFU pushbutton, steering
control of the rudder will return to the control mode selected: When in FFU, steering responds to the action of
the helm. The rudder will continue to move after the helm is moved to the desired position, until the rudder
matches the exact position of the helm as indicated by the rudder order indicator. When in AUTO mode, the
course set by the AUTOPILOT allows hands-off steering of the vessel.
g.
Bowthruster Control The bowthruster control panel located on the pilothouse console provides
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control and monitoring of the bowthruster water jet operation. Indicator lamps are provided to indicate that
electrical power and hydraulic power are available, minimum hydraulic oil level in the hydraulic oil tank, and
minimum lube oil level in the lube oil tank. Alarm horns accompany the visual indication of minimum hydraulic
oil and lube oil tank levels. Pushbutton controls are also provided for activating the electrical power unit and
hydraulic unit. A toggle switch is used for steering the water jet nozzle to the angle of thrust desired. The angle
of thrust is displayed on a meter.
h.
Fire Detection The fire control panel is located in the aft section of the pilothouse and provides the
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bridge with status of the vessel fire detection system. The fire control panel is the system main controller
processor. It processes all incoming signals from each vessel zone and converts them to an independent
output that is displayed on the panel: alarm horn, alarm and status lamps, trouble lamps, battery charger,
current and voltage meters. Controls are provided for system reset and lamp testing, alarm silencing, and
trouble silencing.
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