MIL-DTL- 24784/11C(NAVY)
3.8.5.1 Part 1. Interior communication (IC) systems shall be divided into applicable chapters as follows:
Chapter 1 - IC switchboards (including IC test switchboards).
Chapter 2 - Ship control consoles and ship control indicators.
Chapter 3 - Telephone system, dial.
Chapter 4 - Amplified voice communications, recording, television, and entertainment systems.
Chapter 5 - Electrical alarm, safety, and warning systems.
Chapter 6 - Indicating, order, and metering systems.
Throughout Part 1, where applicable, systems shall be arranged and listed in alphabetical order according to circuit
designations. Circuit designations shall appear to the left of system titles. The description of each installation shall
include the following information, as applicable:
a.
Purpose - The text shall describe the basic purpose for which the subject system is installed.
b.
System classification - Importance and readiness classification shall be designated for each system.
c.
Equipment description - A listing of principal system equipments, including switching, shall be provided.
The list shall denote equipment type, quantity, location, and the functional end use of each. Where
equipments or components (such as loudspeakers and high temperature thermostats), are associated with a
specific group or area, they shall be categorized accordingly.
d.
Operation - The system operational capabilities and limitations shall be described in consonance with the
applicable shipboard installation drawings. Input and output characteristics of major equipments shall be
defined where they affect overall system operation. Special emphasis shall be devoted to modes of
operation, transfer, and action-cutout switching to facilitate expedient operational decisions during damage
emergencies, equipment failure, and changing requirements in system loads. A single line flow diagram
shall be provided to supplement the written text for all systems having complex switching arrangements.
The following is a list of systems having complex switching arrangements either singularly or in
combination with other systems. The list is not intended to preclude diagrams for other systems, where
required, to simplify the operational description:
System title
Circuit
HD-HE
Wind direction and speed system
L
Rudder order system
LB
Steering emergency signal system
LC
Gyrocompass system
XLC
Auxiliary gyrocompass system
LN
Ships inertial navigation system
LV
Ships aircraft inertial automatic navigator
Alignment system
M
Propeller order system
MB
Engine or motor order system
3MB
Engine control order system
4MB
Propulsion control order system
1MC
General announcing systems
13
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