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Identification, friend or foe (IFF) is a combat identification system designed for command and control. It uses a transponder that listens for an interrogation signal and then sends a response that identifies the broadcaster. IFF systems usually use radar frequencies, but other electromagnetic frequencies, radio or infrared, may be used. [1]
IFF Mark II was the first operational identification friend or foe system. It was developed by the Royal Air Force just before the start of World War II. After a short run of prototype Mark Is, used experimentally in 1939, the Mark II began widespread deployment at the end of the Battle of Britain in late 1940.
A pair of CIPs mounted on the side of an M1A1 Abrams' turret. The Combat Identification Panel (CIP), also known as a Coalition Identification Panel, is an Identification friend or foe device mounted on military ground vehicles used by United States Armed Forces' United States Army with United States Marine Corps and its allies to distinguish them from the enemy during battle.
Pages in category "Identification friend or foe" The following 6 pages are in this category, out of 6 total. This list may not reflect recent changes. ...
A transponder, designated as SCH-3 and later called an Identification Friend or Foe (IFF) unit, was placed into production at Factory 339 in 1943. This unit initially responded only to the signal of RUS-2 , and only a relatively small number of these and successor units were built in the USSR.
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IFF Mark III, also known as ARI.5025 in the UK or SCR.595 in the US, was the Allied Forces standard identification friend or foe (IFF) system from 1943 until well after the end of World War II. It was widely used by aircraft, ships, and submarines, as well as in various adaptations for secondary purposes like search and rescue . 500 units were ...
That's also where the term 'IFF' (Identification Friend or Foe) comes from, the RAF were using it during the Battle of Britain and before. The idea was conceived by Robert Watson-Watt as a means for the Chain Home system to distinguish 'friendly' RAF aircraft from possibly-'foe' other aircraft.