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