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Table 12-6.Magazine Designators for Mass Detonating Hazard of High Explosives (Bulk, Depth Charges, Mines, Warheads, Bombs, etc.), Fuzes, Detonators, Exploders, and Black Powder
Table 12-8.Magazine Designators for Fragment Hazard of Projectile and Fixed Ammunition

Aviation Ordinanceman - Aviation theories and other practices
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IDENTIFICATION OF FACILITIES Buildings and magazines, including open storage sites that contain ammunition, explosives, or chemical and inert components, are marked according to a standard system of identification so you can rapidly identify the hazards associated with their contents. This identification and numbering system is used in addition to any other numbers on the buildings. These standard identification markings are stamped out over other markings,   if   present. The standard identification system consists of the magazine designator and the symbol indicator. The magazine designator is a three-group symbol, composed   of   numbers   and   letters.   It   identifies   a magazine   by   location   of   the   magazine   group,   the number of the magazine within the group, and the type of    magazine    construction.    The    magazine    group number,  the  type  of  magazine  and  capacity  letter(s), and the magazine sequence number form the three-group   symbol   that   makes   up   the   magazine designator. Magazine Group Number The magazine group number is the first number of the magazine designator symbol. It shows the magazine group    in    which    the    magazine    is    located.    Each physically separated group of magazines or, at smaller stations, each noncontiguous magazine area is assigned a  number,  making  it  easy  to  identify  the  group.  The group numbers begin with 1 and continue in ascending numerical order. If only one magazine group exists, the number 1 is used. For example, the numeral 4 in the first position of the magazine designator 4XTX4 indicates that this magazine is located within magazine group 4. Magazine Type and Capacity Letter(s) The magazine type and capacity letter(s) shows the type  and  capacity  of  the  magazine.  For  this  reason, magazines   of   certain   sizes   are   assigned   a   letter designation as indicated in tables 12-6, 12-7, 12-8, and 12-9. To show the type of magazine, for example, the letter T is added if the magazine is earth-covered and barricaded.  If  the  magazine  is  earth-covered  but  not barricaded the letter C is added. If the magazine is not earth-covered  but  is  barricaded,  the  letter  S  is  added. Therefore,  in  the  magazine  designator  4XTX4,  the letter   X   in   the   second   position   indicates   that   the magazine size is miscellaneous or nonstandard, and it is normally  used  for  storing  high  explosives.  Also,  the normal    explosive    storage    limit    depends    on    the magazine's size, location, and type of construction. The   explosive   limits   contained   in   tables   12-4 through 12-7 are maximum capacities. They are based on  magazine  design  and  construction  characteristics. These    limits    are    further    subject    to    the    ESQD considerations discussed previously. Additional limitations   are   shown   in   the   magazine   designator. When the ESQD relationship, as indicated in the tables, doesn't permit using the explosive capacity design of a standard  magazine  because  of  insufficient  separating distances, the letter X, Y, or Z is added to the designator. These   letters   indicate   the   magazine   contains   mass detonation  hazards,  mass  fire  hazards,  or  fragment- producing  hazards,  respectively.  For  example,  in  the magazine designator 4XTX4, the letter X in the fourth position  tells  you  that  the  magazine  doesn't  have  a sufficient  separating  distance  from  other  structures  or magazines. Before   1985,   naval   facilities   used   to   store   or maintain  ammunition  or  explosives  used  a  standard two-part   system   of   identification—a   color-hazard indicator and a magazine designator. The color hazard indicator  has  been  replaced  by  a  system  of  fire, chemical hazard, and fire-fighting direction symbols.  When  possible,  mount  placards  at  locations that are visible for a minimum distance of 500 feet in the   daytime.   Placards   are   placed   on   the   road   at distances  of  not  less  than  500  feet  to  indicate  the magazine contents. This is required when vegetation or curves in the road obstruct visibility. When the contents of the magazine are changed or removed, the placards are   also   changed   or   removed.   These   placards   are displayed  to  help  fire  fighters  identify,  from  a  safe distance,  the  type  of  hazards  involved  so  they  can determine  the  types  of  equipment  and  procedures  to use. REVIEW NUMBER 1 Q1. Mandatory regulations governing the storage of ammunition ashore are found in ________. Q2. What prefabricated, concrete-constructed magazine is earth-covered and arch-shaped? Q3. What  is  the  normal  size  of  a  box-type  mag- azine? Q4. What concrete-constructed magazine is shaped like a beehive or dome? Q5. What  magazine  type  consists  of  a  tunnel  or cave that has varied dimensions? 12-11







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