Military Glossary

H-46
See Sea Knight.

Half-residence time
(DOD, NATO) As applied to delayed fallout, it is the time required for the amount of weapon debris deposited in a particular part of the atmosphere to decrease to half of its initial value.

Handover/crossover
(DOD) In evasion and recovery operations, the transfer of evaders between two recovery forces.

Hard missile base
(DOD, NATO) A launching base that is protected against a nuclear explosion.

Harmful appreciations
See appreciations.

Hasty breaching
(DOD, NATO) The rapid creation of a route through a minefield, barrier, or fortification by any expedient method.

Hawkeye
(DOD) A twin turboprop, multicrew airborne early warning and interceptor control aircraft designed to operate from aircraft carriers. It carries a long-range radar and integrated computer system for the detection and tracking of airborne targets at all altitudes. Designated as E-2.

Head-up display
(DOD) A display of flight, navigation, attack, or other information superimposed upon the pilot's forward field of view.

Heavy antitank weapon
(DOD) A weapon capable of operating from ground or vehicle, used to defeat armor and other material targets.

Heavy-lift cargo
(DOD) 1. Any single cargo lift, weighing over 5 long tons, and to be handled aboard ship. 2. In Marine Corps usage, individual units of cargo that exceed 800 pounds in weight or 100 cubic feet in volume.

Helicopter approach route
(DOD, NATO) The track or series of tracks along which helicopters move to a specific landing site or landing zone.

Helicopter support team
(DOD, NATO) A task organization formed and equipped for employment in a landing zone to facilitate the landing and movement of helicopter-borne troops, equipment and supplies, and to evacuate selected casualties and enemy prisoners of war.

HERO SAFE ordnance
(DOD) Any ordnance item that is percussion initiated, sufficiently shielded or otherwise so protected that all electro-explosive devices contained by the item are immune to adverse effects (safety or reliability) when the item is employed in its expected radio frequency environments, provided that the general hazards of electromagnetic radiation to ordnance requirements defined in the hazards from electromagnetic radiation manual are observed.

High altitude low opening parachute technique
(DOD) A method of delivering personnel, equipment, or supplies from airlift aircraft which must fly at altitudes above the threat umbrella..

High-risk-of-capture personnel
(DOD) US personnel whose position or assignment makes them particularly vulnerable to capture by hostile forces in combat, by terrorists, or by unfriendly governments.

High value airborne asset protection
(DOD) A defensive counterair mission which defends airborne national assets which are so important that the loss of even one could seriously impact US warfighting capabilities or provide the enemy with significant propaganda value. Examples of high value airborne assets are Airborne Warning and Control System, Rivet Joint, Joint Surveillance and Target Attack Radar System, and Compass Call. Also called HVAA protection.

High-water mark
(DOD) Properly, a mark left on a beach by wave wash at the preceding high water. It does not necessarily correspond to the high-water line. Because it can be determined by simple observation, it is frequently used in place of the high-water line, which can be determined only by a survey. When so used, it is called the high-water line.

HNS
See host-nation support.

Holding pattern mode
(DOD) Automatic control of an aircraft to fly the programmed holding pattern.

Horizontal action mine
(DOD, NATO) In land mine warfare, a mine designed to produce a destructive effect in a plane approximately parallel to the ground.

Horizontal stowagee
(DOD) The lateral distribution of unit equipment or categories of supplies so that they can be unloaded simultaneously from two or more holds.

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