modular stowage and the addition of larger weapons
elevators to service these areas brought about the
Improved Rearming Rate Program (IRRP).
The IRRP allows major handling time
improvements in two areas-rearming and weapons
assembly. Stowing ammunition as received on pallets
lets handling crews rearm the ships mission load in less
time than the old system. In turn, handling time is
minimized during weapons assembly.
DESIGNATION OF MAGAZINES
Magazines or ammunition spaces afloat are
designated with particular reference to the purpose
intended. Generally, magazines aboard ship are
designated to hold a single type of ammunition.
Magazines are designated as single-purpose
stowage magazines whenever practical. The following
are single-purpose magazine designations: powder and
rocket motor magazine; hyperbolic rocket engine
magazine; fixed ammunition magazine; small arms
magazine; missile magazine; warhead locker or
magazine; aircraft bomb magazine; projectile and
rocket head magazine; fuze magazine; detonator locker;
pyrotechnic magazine or locker; ready-service
ammunition room, box, rack, or locker; and chemical
While stowage of a single type of ammunition in an
individual magazine is desirable, it isnt always
possible. NAVSEASYSCOM authorizes certain mixed
stowages in magazines that retain a single-purpose
designation. Where stowage space is limited and the
mission requires carrying various types of ammunition,
stowage of more than one type of ammunition in a
magazine is an acceptable hazard. Authorization for
this type of stowage is at the discretion of the operational
Generally, there are magazines for each type of
ammunition stowed aboard ship. Ammunition,
explosives, and explosive components are stowed in
specifically designated stowage spaces. Ammunition
stowage spaces aboard ships are limited, and in certain
classes of ships, extremely limited. Therefore,
ammunition stowed aboard ship should stay within
authorized ammunition allowances. Its important for
shipboard ammunition to be stowed so maximum
effectiveness is achieved. For these reasons, strict
compliance with ammunition stowage by compatibility
groupings aboard ship, while desirable and observed
when practical, may not be feasible. When mixed
stowage is used, make sure that it conforms to the
stowage tables listed in Ammunition Afloat, NAVSEA
Table 11-1 is an example of the permissible mixed
stowage of ammunition types in shipboard magazines.
The different types of ammunition are listed in the first
column of table 11-1. The types of magazines are listed
across the top of the table. The type of ammunition is
stowed only in those magazines indicated by a black box
intersecting the horizontal line for the ammunition item
and the vertical line for the type of magazine.
REVIEW NUMBER 1
What command develops and approves
specifications for construction of Navy ships?
A ships primary magazines are usually
What type of magazines are located close to the
area to be served?
What is the purpose of modular stowage?
List the two areas that the IRRP created
Squadron personnel use a
preloaded IMERS and ITERS.
Generally, magazines aboard ship are
designated to hold
Authority for stowing mixed types of ammunition
in a magazine rest with .
ENVIRONMENTAL CONTROL SYSTEMS
Magazines are fitted with environmental control
and safety features to protect ammunition from
excessive temperatures and humidity. Most magazines
have either mechanical cooling or ventilation systems.
However, there are a few magazines that dont have
either of these features. If a magazine without controls
shows a heat gain in excess of 100°F, use portable
ventilation systems to prevent overheating or
condensation of moisture.