REVIEW NUMBER 1 ANSWERS A1. Mandatory regulations governing the storage of ammunition ashore are found in OP 5 VOL 1. A2. The   keyport   magazine   is   a   prefabricated, concrete-constructed magazine that is earth-covered and arch-shaped. A3. The normal size of a box-type magazine is 12 feet by 17 feet. A4. The    Corbetta    magazine    is    a    concrete- constructed magazine shaped like a beehive or dome. A5. The Gallery magazine consists of a tunnel or cave that has varied dimensions. A6. Detonators and similar initiating devices are contained in storage compatibility Group B. A7. Black    powder    belongs    in    compatibility storage group D. A8. Ammunition that doesn't present any significant  hazard  is  found  in  compatibility Group S. A9. The  first  number  in  a  magazine  designator symbol shows the magazine group number. A10. 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 Sites 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 parts—a 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 explosives. 12-15 STORAGE DESIGNATOR Advanced base magazine: Explosion hazard Fire hazard Fragment hazard Open storage Caves and tunnels X Y Z R G Table 12-11.—Letter Designators for Advanced Base Storage