t h e flashing RPM and/or PITCH
ENGINE ORDER TELEGRAPH Section
ACKNOWLEDGE push button.
This section is a set of digital displays used
l The light stops flashing and the audible
primarily as a backup throttle communications
alarm is turned off.
systems. This system is used when the PACC is
in control of the throttles. The digital displays
l The operator then manually changes the
are identical for the port and starboard shaft.
proper PLA and/or PITCH potentiometer
There are three digital displays and a set of
or moves the ITC lever.
thumbwheels to indicate PITCH and RPM for
each shaft. The digital displays are labeled
ACTUAL, ORDERED, and SET. Each shaft has
ALARM ACK Section
three push-button indicators under the headings
PORT ACKNOWLEDGE and STARBOARD
The ALARM ACK section has two push
ACKNOWLEDGE. These push buttons are labeled
buttons (three on the CG console) labeled HORN
PITCH, STD ORDER, and RPM. Between these
and SIREN (and BELL). The PACC operator
two headings is a set of three push buttons under
uses these push buttons to acknowledge and
the heading PLANT MODE ACKNOWLEDGE.
silence an audible alarm (either horn, siren, or
The push buttons are labeled SECURE, SPLIT
bell).
PLANT, and FULL POWER. The PACC
operator uses these push buttons to acknowlege
the respective change of plant mode order from
THROTTLE TRANSFER Section
the officer of the deck (OOD).
The digital display of the pitch and rpm,
This section has two push buttons for control/
labeled ACTUAL, is the actual pitch setting and
display of the station in control of the throttle.
rpm of the shaft at that moment in time. The
They are labeled PILOT HOUSE and CCS.
digital display of the pitch and rpm, labeled
Throttle/pitch control is possible at one of three
ORDERED, is the commanded pitch setting and
locations (PLCC, PACC, or SCC).
shaft rpm from the OOD. The digital display of
For the SCC to have integrated throttle
the pitch and rpm, labeled SET, is the pitch and
control, both the PLCC and PACC must have
rpm selected by the thumbwheels by the PACC
their remote stations selected. That is, the PLCC
operator.
must have at least one GTM and EOT control
The actual RPM and PITCH are digitally
transferred to the PACC. The PACC must have
displayed at the SCC, PACC, and PLCC. When
the throttle control transferred to the SCC. At the
the OOD orders the SCC operator to change RPM
PLCC, only manual throttle and pitch control for
and/or PITCH, the following events occur:
their respective GTMs is available. Manual
control of an individual GTM may be transferred
The SCC operator sets the new values of
to the PACC from the PLCC. At the PACC, each
RPM and PITCH on the thumbwheels and
GTM may be controlled manually by rotary
then depresses the RPM and PITCH
potentiometer controls which operate the same as
ALERT push buttons.
the lever controls found at the PLCC. Either or
both GTMs may then be placed in auto control.
These signals are sent to the PACC
For the PACC operator to transfer throttle
and PLCC where they appear on the
control from the PACC to the SCC, both GTMs
digital displays labeled RPM and PITCH
must be in auto throttle control. The PACC
ORDERED. At the same time, an audible
operator may take throttle control from the
alarm is sounded and the RPM and/or
SCC at any time. The PLCC operator may take
PITCH ACKNOWLEDGE push-button
throttle/pitch control from the SCC or PACC at
lights begin to flash.
any time.
When the PACC is in control of the throttle,
STARBOARD SHAFT DEMANDS PANEL
the operator responds in the following manner:
This panel is shown in figure 5-11. It is
The operator sets the new RPM and/or
divided into four sections. These sections are
PITCH on the thumbwheels and depresses
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