scope:

This instruction applies to the computation of combat (i.e., war reserve) requirements for selected Threat and Level-of-Effort (LOE) non-nuclear ordnance under the purview of the NNOR process. Only Department of the Navy Threat and LOE ordnance, which the NNOP Board has agreed to include in the NNOR process, are within the scope of this instruction. A complete listing of ordnance for which an annual requirement is computed under the NNOR process is reflected in reference (d). This list is updated annually at the commencement of the NNOR update cycle.

a. Threat ordnance is used against a finite enemy target base, or enemy targets not easily reconstituted. Targets include ships, submarines, aircraft and anti-ship cruise missiles. Threat ordnance currently includes torpedoes (MK-48 ADCAP and MK-50), air-to-air missiles (PHOENIX, AMRAAM, SPARROW and SIDEWINDER), surface-to-air missiles (Standard Missile, RAM and SEASPARROW), anti-ship cruise missiles (HARPOON and TOMAHAWK Anti-Ship Missile (TASM)) and naval mines. The combat requirement (program and planning objectives) is based on the percentage of targets that must be destroyed.

b. LOE ordnance is composed of air-delivered ordnance used against unlimited enemy targets such as personnel, bridges, factories and tanks. Ship gun ammunition, countermeasure devices and sonobuoys are used according to a specified expenditure rate. LOE ordnance currently includes bombs (MK-80 Series and Rockeye), guided and unguided air-to-surface weapons (laser guided bombs, IR Maverick, Laser Maverick, Hellfire, 2.75 inch and 5 inch rockets, Advanced Interdiction Weapon System (AIWS), Standoff Land Attack Missile (SLAM) and Penguin), antiradiation weapons (HARM, SIDEARM, and Tacit Rainbow), 16-inch and 5-inch ship gun ammunition, airborne, shipboard and submarine expendable countermeasure devices (flares, chaff and noisemakers) and sonobuoys. The combat requirement is based on either the physical ability to deliver the weapons (number of aircraft sorties) or an expenditure rate (rounds per day, expendables per encounter or sonobuoys per sortie), rather than the percentage of targets that must be destroyed.

c. The NNOR process does not currently compute a combat requirement for nuclear, chemical or biological weapons, small arms ammunition, or Marine Corps ground ammunition. TOMAHAWK (other than TASM) is currently excluded from the NNOR ordnance list together with older, less capable models of some threat weapons (e.g., AIM-54A and MK-48 Mod 4 torpedo) and ship gun ammunition under five inches. For ordnance under the purview of the platform/resource sponsors (i.e., ship gun ammunition under five inch), reference (e) establishes the methodology for computing combat requirements in accordance with reference (f) guidelines.