. When a random sampling inventory of that storeroom fails to meet the inventory accuracy rate of 90 percent. . When directed by the type commander (TYCOM) before a supply management inspection (SMI). . When directed by the commanding officer (CO). . When circumstances clearly shows that it is required for effective inventory control. SPECIFIC COMMODITY INVENTORIES Specific commodity inventories are physical counts of all items of generic segments of material. For example, this would include an inventory of material under the same cognizance symbol. This type of inventory is taken under the same conditions as a bulkhead-to-bulkhead inventory. However, this type of inventory requires prior knowledge of specific stock numbers and item locations. SPECIAL MATERIAL INVENTORIES Special material inventories require the physical count of all items, which because of their physical characteristics, cost, mission essential status, criticality, or other reasons, are specifically designated for separate identification and inventory control. Special material inventories include, but are not limited to, stocked items designated as classified or hazardous. Special material inventories also include controlled equipage and presentation silver. Physical inventories of such material are required on a scheduled basis as prescribed in chapter 6 of NAVSUP P-485. Classified Items Classified items require an inventory annually and upon change of custodial responsibility. Security codes identify classified items in stock records. See the listing of security codes in appendix 9 of NAVSUP P-485. Hazardous Items Perform physical inventory of hazardous items annually. During the inventory, carefully inspect each unit of every item for material condition, correct identification, and proper marking or labeling. Depot-Level Repairable Inventory aviation depot-level repairable (AVDLR) items annually. After completing the inventory, turn in all repairable identified as excess to the nearest ashore supporting activity. Induct those repairable requiring condition tags to the supporting maintenance for test, check or repair. Items not in the stock record must be taken up in stock after adding the information in the stock record. Before adding information to the record, stock control should completely research these items to avoid duplication or erroneous records. Other Materials Other stock items that may be specifically designated by the inventory manager, fleet commander, TYCOM, or the CO for special inventory control should be inventoried according to the frequency established by the directing authority. Shelf-Life Items criteria Deteriorative shelf-life items, other than those included in the items just discussed, are not required to be periodically inventoried, but must be screened as often as necessary to ensure timely use or transfer before their shelf-life expiration date. SPOT INVENTORIES Spot inventories are unscheduled physical inventories taken to verify the existence of specific stock items. A spot inventory is taken as a result of the following: . When the request shows total not in stock (NIS) but the verified stock record for the requested item shows anon-hand balance. . When issue transaction is a partial NIS issue and stock record shows that anon-hand balance is more than the issued quantity. . To determine the on-hand quantity of a particular item when and as requested by the CO, TYCOM, cognizant inventory manager, or other competent authority. An example of a spot inventory is when the CO requests the physical inventory of an item that he or she considers to be highly essential to prospective operations. Another example is when the type commander needs to have total asset visibility of a particular critical item. 10-10