The time limit for aircraft: Switch to 90 days beacons as of January 1, 2018.

The new generation has already landed: SID88 – the new low frequency underwater locator beacon for aviation.

EASA issued Opinion No.1 in 2014 requiring all aircraft to switch to 90 days beacons meeting FAA‘s TSO-C121b as of January 1, 2018.

The answer to TSO-C121b: BLUE90, the 90 days underwater locator beacon for aviation.

BLUE90


SID88


ULYSER