REVIEW NUMBER 1
Mandatory regulations governing the storage
of ammunition ashore are found in OP 5
The keyport magazine is a prefabricated,
earth-covered and arch-shaped.
The normal size of a box-type magazine is 12
feet by 17 feet.
The Corbetta magazine is a concrete-
constructed magazine shaped like a beehive
The Gallery magazine consists of a tunnel or
cave that has varied dimensions.
Detonators and similar initiating devices are
contained in storage compatibility Group B.
Black powder belongs in compatibility
storage group D.
significant hazard is found in compatibility
The first number in a magazine designator
symbol shows the magazine group number.
The letter T in the third position of a magazine
designator indicates that the magazine is
earth-covered and barricaded.
Identification of Magazines and Open Storage
When practicable, magazines, buildings used as
magazines, and piles of ammunition stored in the open
are marked according to the system of identification
you have already read about. At advanced bases, the
identification system consists of two partsa group
construction symbol and a symbol hazard indicator.
The group construction symbol is a three-group
symbol that consists of the following:
1. A number indicating the group in which the
magazine or open storage site is located,
2. A letter or group of letters designating the type
and capacity of the magazine, and
3. A number designating the sequence of the
magazine within the magazine group or area.
Letter designators for advanced base storage are
indicated in table 12-11. To indicate the nature of the
construction of the magazine, the letter T is added if the
magazine is earth-covered and barricaded; the letter C
is added if the magazine is earth-covered, but the door
isn't barricaded. The letter T is also used to designate
open storage. Advanced base magazines, buildings
used as magazines, caves, tunnels, and open storage
sites do not conform to the standard magazine sizes
prescribed in NAVSEA OP 5, volume 1. Therefore, the
letters X, Y, or Z that identify explosion hazard, fire
hazard, or fragment hazard, respectively, are used in
place of the standard letter designators. Accordingly,
XT is applied to an earth-covered, barricaded,
advanced base magazine that is used for storing high
Advanced base magazine:
Caves and tunnels
Table 12-11.Letter Designators for Advanced Base Storage