Equipment  includes  any  functional  unit of hull, mechanical, electrical, electronic, or ordnance types of materials that are operated independently or as a component of a system or subsystem; it is identified by an Allowance Parts List (APL) number. Examples of equipment are the ship’s sonar and radar, the anchor windlasses, and the main reduction gears. Equipage is a general term that includes items of a durable nature listed in the Equipage Category  Numbered  Allowance  Parts  List, Allowance Equipment Lists, or other authorized listings issued by appropriate authority. Equipage does not encompass installed electronic, electrical, mechanical, or ordnance equipment, components, or systems, These items are considered to be equipment. Equipage consists of items such as fire hoses,  nozzles,  applicators,  anchors,  anchor chains, chain stoppers, and bulkhead fans. Some selected items are termed Controlled Equipage  and  require  increased  management control because they are expensive, vulnerable to pilferage, or essential to the ship’s mission. A list of these designated items can be found in Afloat Supply Procedures,  NAVSUP P-485. Repair parts are any items, including modules and consumable material, that have an equipment application and appear in an Allowance Parts List, an Allowance Appendix Page, a Stock Number Sequence List (SNSL), an Integrated Stock List (ISL), or a manufacturer’s handbook. Consumables  are  administrative  and housekeeping  items,  such  as  general-purpose hardware, common tools, or any other items not specifically defined as equipment, equipage, or repair parts. Some services are also procured by the supply department for the ship. They include such requirements as commercial telephone service, pilotage, tug hire, repairs of office equipment, and the rental of certain types of equipment. Some material is NOT controlled by the supply department. Certain material categories afloat are not under the control of the supply department. They include the following items: 1. Ammunition and ammunition containers are the responsibility of the ship’s weapons officer. 2. Nuclear weapons obtained through opera- tional channels are the responsibility of the weapons  officer. 3. 4. Medical  stores,  including  drugs  and pharmaceutical supplies, surgical instru- ments, and other professional medical equipment are the responsibility of the senior medical representative. The supply department procures medical supplies and equipage, but has no responsibility over inventory  control. Marine Corps stores (when a Marine Corps detachment is aboard) is the responsibility of the officer in charge of the detachment, DETERMINATION OF REQUIREMENTS The supply officer is responsible for main- taining stocks of general stores, subsistence items, ship’s  store,  and  clothing  store  stocks.  These stocks should be maintained at levels sufficient to  meet  probable  demands  and  within  limits established by operations plans. Therefore, the supply officer, with other supply personnel, should  be  able  to  accurately  determine  the requirements for these items. The supply officer is jointly responsible with each department head for maintaining a full allowance of equipage on board. Because of main- taining the equipage records, the supply officer exercises control over the overall ship’s equipage allowance; however, the supply officer should be advised by the heads of departments of known or anticipated requirements and replacements. Most repair parts are in the custody of the supply officer. The supply officer is responsible for submitting replenishment requisitions to replace material that has been issued. Department heads are responsible for submitting a NAVSUP Form 1250-1 requisition to the supply officer each time a repair part is needed. Department heads expect your cooperation in maintaining records and anticipating requirements. Factors in Determining Requirements Before the types and quantities of items carried can be determined, a desired endurance should be established for general categories of material. Endurance is the period of time required for a ship to use a definite quantity of supplies. Endurance is based on the amount of available storeroom space and the allocation of that space among the types of stores. The space is then converted to the number of days that the ship can be maintained by capacity loading. The supply 4-7