TADIL-A

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TADIL-A/Link 11 is a secure half-duplex TADIL radio link used by NATO that receives or transmits--but not both simultaneously--a sequential data exchange digital link. It 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 US Army uses only HF.

Link 11 will be replaced by Link 22.