Figure 6-18.The Mk 75 gun system, general configuration.
The gun mount crew consists of the mount captain,
two loaders, and the safety observer.
The mount captain is stationed in the ammunition-
handling room at the gun control panel (GCP). It is the
mount captain's responsibility to set the gun up for the
desired mode of operation, then monitor it, in case of a
malfunction. In case of a malfunction or misfire, the
mount captain supervises and directs the corrective
The two loaders are stationed in the ammunition-
handling room during loading and unloading operations.
Their primary duties are to load and unload the gun, clear
misfires, and assist in corrective maintenance. Although
the actual loaders may be Gunner's Mates (GMGs), you
may be stationed in the handling room to assist in breaking
out the ammunition for loading.
The safety observer is stationed topside, near the gun.
It is the responsibility of the safety observer to monitor the
gun and the area around the gun for any unsafe condition.
The safety observer is in direct contact with the mount
LEARNING OBJECTIVE: Define the duties of
a hot-gun crew.
As is true of all mechanical devices, guns, too, are
susceptible to malfunctions. In the case of a gun
system, however, you are also dealing with large
quantities of propellant and high explosives. When a
gun misfires, either the casualty must be corrected
quickly or the round removed from the gun chamber
and disposed of over the side. A hot gun is a gun that
has fired a sufficient number of rounds in a defined
period of time and reaches a temperature that could
cook off the round in the chamber. And should the gun
misfire while in the hot-gun condition, clearing the
gun quickly becomes a very high priority. An inbore
explosion is a catastrophic event and should be
avoided at all cost.
As a member of the hot-gun clearing crew, you will
assist the Gunner's Mates in clearing the misfired round
from the gun. They will actually remove the round from