| Did You Know? |
When transponders were first introduced, they were called IFFs, which stands for "Identification, Friend or Foe." They were very simple and could only offer limited codes. More capabilities were added and the name changed to IFF/SIF, which added "Selective Identification Feature."
Pilots referred to them as "parrots" which lead to the term "squawk" for entering a code. Before the IDENT feature was added, controllers would ask pilots to squawk standby for identification, sometimes saying, "Strangle your parrot for five," meaning squawk standby for five seconds. |
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