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 TM 55-1905-223-10
2-23. Engine Order Telegraph (EOT). The Engine Order Telegraph is used when Pilothouse is not in control
of main propulsion system. Orders are issued by Pilothouse to Engine Room Operating Station to change
engine speed or direction (forward or reverse). The following procedures will be used at Pilothouse Console
(PHC) and the Engine Room Operating Station Console (ERC).
a. Pilothouse Console (PHC).
(1) On 24V Distribution Panel, set ENGINE ORDER TELEGRAPH switch (1, FIGURE 2-186) to ON
position. This panel is located in the communications area.
(2) On the Pilothouse Console EOT Panel (FIGURE 2-187) select the direction and speed desired.
Example: port slow speed ahead, press port SLOW AHEAD pushbutton indicator (1).
NOTE
Alarm will sound at PHC and SLOW AHEAD pushbutton indicator will light.
(3) The Pilothouse will know the order is acknowledged when the alarm stops. The port SLOW AHEAD
pushbutton indicator (1) will remain on.
b. Engine Room Operating Station (EOS).
(1) In the Engine Room Operating Station an alarm will sound; port SLOW AHEAD pushbutton indicator
(1) will flash.
(2) Press port SLOW AHEAD pushbutton indicator (1) to acknowledge order has been received. The
alarm will stop, and pushbutton indicator will remain on.
NOTE
Wrong direction indicator will flash until the throttle is placed in the proper
direction.
All order pushbutton indicators on EOT operate in the same manner.
c. Transferring Control Air to Bridge.
(1) At Pilothouse Console, push BRIDGE CONTROL pushbutton indicators (2 and 3, FIGURE 2-187) at
the same time.
(2) After EOS acknowledges pull up CONTROL AIR STA TRANSFER VALVE (3, FIGURE 2-188).
(3) THROTTLE AIR PRESSURE gauge (2) needle indicates air pressure at Pilothouse Console.
d. Ordering Engines to Be Secured.
(1) Press FINISHED WITH ENGINES (4, FIGURE 2-187); EOS will acknowledge.
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