MIL-STD-6011 exchanges digital information among airborne, land-based, and ship-board tactical data systems. It is the primary means to exchange data such as radar tracking information beyond line of sight. TADIL-A can be used on either high frequency (HF) or ultrahigh frequency (UHF). However, the U.S. Army uses only HF. Link 11 relies on a single platform to report positional information on sensor detections. This positional information can be amplified with additional data to qualify the identity of the detected track. Link 11 was developed by Ralph Benjamin while with the Admiralty Surface Weapons Establishment (ASWE), Portsmouth.
Link 11 will be replaced by Link 22.
Link 11 is defined by the United States Department of Defense as MIL-STD-6011.
The NAUTIS (Naval Autonomous Tactical Information System) originally included the Link 11 system as installed in the Royal New Zealand Navy's Leander-class frigates as part of the mid life upgrades in the 80's HMNZS Canterbury, NAUTIS versions were also found on the Royal Navy Hunt-class minesweepers. 
Change of terminology
- Federation of American Scientists article: Tactical Digital Information Links (TADIL)
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