Audio: Mayday transmission (3 minutes 26 seconds)
SAN FRANCISCO- In this radio tranmission, recorded by Sector San Francisco, a woman hails mayday over Channel 16, the international hailing and distress channel, Monday, Sept. 6, 2010. Coast Guard watchstanders attempted to hail her back and were unsuccessful. Coast Guard crews searched for her until the case was suspended, Tuesday, Sept. 7, 2010. U.S. Coast Guard audio.