to primary power circuits, dc circuits, control wiring,
and ground conductors serving cryptographic
equipment and subscriber terminal equipment that are
designated RED.
The RED designation also applies to junction
boxes, distribution frames, terminal boxes, conduit,
ducts, cable racks and hangers, patching and switching
panels, cabinets, power distribution panels (both ac
and dc), and other ancillary equipment serving the
conductors and equipment mentioned above.
Primary Red
Any conductor intended to carry classified plain
language terminating in RED equipment or the RED
side of crypto equipment is designated PRIMARY
RED.
Secondary Red
Any conductor, other than PRIMARY RED, that
connects to RED equipment, the RED side of crypto
equipment, or the RED side of isolation devices, and
does not intentionally carry classified information, but
because of the coupling mechanism with the RED
equipment might carry compromising information, is
designated SECONDARY RED. Some examples you
are probably familiar with are indicator lines, and
control and timing lines. Power distribution panels and
grounding systems serving RED conductors are also
designated SECONDARY RED.
BLACK CRITERIA
The BLACK designation applies to all conductors
and equipment involved in handling or processing
unclassified plain language and encrypted information
in electrical form. It also applies to all facilities and
circuits that are not designated RED.
PORTABLE AND PACK RADIO
EQUIPMENT
Because portable and pack radio sets must
be lightweight, compact, and self-contained, they
are usually battery- or generator-powered, have low
output power, and are either transceivers or
transmitter-receivers. Navy ships and Special Forces
carry a variety of these radio sets for amphibious and
emergency communications, with the equipment type
varying according to the needs of the ship or command.
The following paragraphs introduce some of these
equipment.
AN/CRT-3A
Radio transmitter AN/CRT-3A, popularly known
as the “Gibson girl,” is a rugged emergency transmitter
carried aboard ships and aircraft for use in lifeboats
and liferafts. Shown in figure 2-21, it operates on the
Figure 2-21.—Emergency Transmitter AN/CRT-3A.
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