Each end of the metal tube is enclosed by a plastic
PERSONNEL DISTRESS SIGNALS
cap. Under each cap is a pull ring. When you pull the
Three types of personnel distress pyrotechnic
ring, a friction wire moves through a cap coated with a
devices are currently found aboard surface ships. The
composition that ignites (by friction), setting off either
Mk 13 smoke and illumination signal and the Mk 1
the flare or the smoke canister (depending on whichring
Navy light are hand-held signaling devices. The Mk 79
you pull).
personnel distress signal kit contains compact light
signal rounds that are shot into the air.
The signal body carries illustrated instructions for
use. The flame end plastic cap has three prominent
Mk 13 MARINE SMOKE AND
protrusions (beads) across its face to identify it as the
ILLUSTRATION SIGNAL
end to use at night. When you use the signal, point it
away from your face and hold it at arm's length at a 45-
The Mk 13 marine smoke and illumination signal
degree angle after it ignites. After the end of the signal
(fig. 3-10) is a metal cylinder about 5 1/8 inches long
that you ignited burns out, douse the signal to cool its
and 1 5/8 inches in diameter. It weighs between 6 and
metal parts. Keep the signal so that, if necessary, you
7 ounces. One end contains a canister that, when
can use the other end. Each end is separately insulated
ignited, produces orange smoke for about 20 seconds.
and waterproofed. NEVER try to use both ends at once.
The other end contains a pyrotechnic flame pellet that
When you use the smoke signal, keep it to leeward.
will burn for approximately 20 seconds.
Figure 3-10.--The Mk 13 marine smoke and illumination signal.
3-9