For own improved storage, compute the total cubic capacity by multiplying the net storage space (SQ FT) by an average stacking height of 10 feet. Remember that  stacking  height  may  vary  depending  on  the characteristics  of  the  material. For unimproved open storage, multiply the square feet occupied by the representative stacking height. ATTAINABLE  CUBIC  FEET The  attainable  cubic  feet  is  the  product  of  net storage space (SQ FT) multiplied by the stacking height permitted  by  safety  regulations  and  floor  load limitations  with  the  use  of  MHE.  Therefore,  the attainable cubic feet represents the cubic space usable or  available  for  storage  with  existing  resources  as shown in figure 2-8. For  determining  the  attainable  cubic  feet  for improved open storage, use the same formula as cubic space  capacity. BIN  CUBIC  CAPACITY The  cubic  capacity  of  the  bin  is  computed  by multiplying the length by the width by the height of its outside dimensions. The unused cubic space above the bin will not be included as attainable space. RACK CUBIC CAPACITY The  cubic  capacity  of  the  rack  is  computed  by multiplying  the  outside  dimensions  of  the  length  by  the width by the height. The cubic space above the rack is included to the extent permissible by safety regulations. OCCUPIED  SQUARE  FEET The occupied square feet is the area occupied by bins, racks, and materials in covered or open bulk areas. The bin and rack space is considered occupied whether or not material is stored therein. To determine the occupied  area  (SQ  FT),  multiply  the  length  by  the width. OCCUPIED CUBIC FEET Determine  the  occupied  cubic  feet  by  multiplying the net square feet by actual storage height(s). Compute   the   bin   and   rack   occupancy   by determining the vacant cubic feet portion and subtract it from the attainable cubic feet. OCCUPIED NET STORAGE SPACE The simpler method of determining the occupied net storage space is by computing the total vacant space and subtracting it from the total net storage space. Computing  the  actual  vacant  space  is  easier  than measuring  the  space  actually  occupied.  To  compute  the vacant space, measure the floor area that is not actually occupied by material. Include the space occupied by empty  pallets  and  dunnage  as  vacant  space. POTENTIAL  VACANT  SPACE The two types of potential vacant space are type A and type B. Type A is short spaces or broken spaces in front of stacks that cannot be used for storing supplies other than identical sires, lots, and so forth. Type A vacant space is usually the result of honeycombing or poor  warehousing.  Type  B  is  low  stacking  that  is caused by failing to stack material to the full permissible height. The following factors are not considered as potential vacant space: low stacking caused by floor load  limitations,  the  height  of  roof  rafters  and  ceiling joists,  and  commodity  characteristics. STORAGE  OPERATIONS The  basic  storage  operations  involve  receiving, storing, and shipping of materials. An effective supply system greatly depends on the smooth flow of material and  paperwork  from  these  operations. RECEIVING Quick  and  accurate  processing  of  receipts  directly contributes to an effective supply system. Receiving operations are directly influenced by several factors. These  include  the  type  of  materials  to  be  handled, distance to storage locations, type of MHE available, and  characteristics  of  the  storage  facility.  The principles  of  receiving  is  basically  the  same.  The incoming   material   is   received,   processed,   and distributed.  Some  incoming  material  requires  special handling and control. These include materials that are classified as pilferable or sensitive (including small arms). Refer to Afloat Supply Procedures, NAVSUP P-485, Supply Ashore, NAVSUP Publication 1, Volume 2, and  Department  of  the  Navy  Information  and Personnel Security Program Regulation,  OPNAVINST 2-20