Which specific frequency is used for the final homing phase by aircraft?
Answer
121.5 MHz
The 121.5 MHz frequency serves as a critical component in emergency response, functioning as the primary signal used by overflying aircraft to pinpoint the exact location of a distressed vessel or individual during the final homing phase. While 406 MHz is utilized for initial digital alerts and data transmission via satellite, it lacks the specific utility required for the localized, precise tracking that 121.5 MHz provides once rescuers are in the immediate vicinity of the target.
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