Military Acronyms and Definitions - MilitaryDictionary.org

parallel chains of command

In amphibious operations, a parallel system of command, responding to the interrelationship of participating forces, wherein corresponding commanders are established at each subordinate level of all components to facilitate coordinated planning for, and execution of, the amphibious operation.

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search and rescue numerical encryption grid

A predesignated ten-letter word without repeated letters used exclusively by recovery forces or isolated personnel to encrypt numerical data such as position, time, headings, etc., in a covert manner.

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maritime superiority

That degree of dominance of one force over another that permits the conduct of maritime operations by the former and its related land, maritime, and air forces at a given time and place without prohibitive interference by the opposing force.

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air defense area

United States--Airspace of defined dimensions designated by the appropriate agency within which the ready control of airborne vehicles is required in the interest of national security during an air defense emergency.

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immediate message

A category of precedence reserved for messages relating to situations that gravely affect the security of national and multinational forces or populace and that require immediate delivery to the addressee(s).

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