Stranded teens rescued after pilot spotted SOS in sand

The stranded teens were rescued after carving HELP in large letters into the sand. (HANDOUT/Australian Maritime Safety Authority)

Three teenagers stranded along a remote stretch of coastline have been rescued after their desperate plea for help written in the sand was spotted from the air.

The marooned trio's 4WD became bogged in the Hutt Lagoon area south of Kalbarri, about 100km southwest of Geraldton on the Western Australian coast on Saturday.