A search for a possible missing plane is underway on Friday, south of the Point Reyes National Seashore, a spokesman said.

A signal was transmitted from an emergency locator transmitter to the U.S. Coast Guard around 1 p.m. Thursday, according John Dell’Osso, Chief of Interpretation and Resource Education at Point Reyes National Seashore.

The Coast Guard searched two miles offshore but nothing was found, Dell’Osso said.

A signal from another transmitter was received from the south end of the Point Reyes National Seashore in the Bolinas area, and 20 to 30 people searched on land until 3 a.m. Friday, Dell’Osso said.

The land search resumed around 8 a.m., Dell’Osso said.

The Marin County Sheriff’s Office’s Search and Rescue Team, Bolinas Fire Department, Marin County Fire, Napa County Search and Rescue, National Park Service, Bay Area Mountain Rescue Unit, California Highway Patrol and Civil Air Patrol are searching for a possible downed aircraft, Dell’Osso said.

An ELT transmitter is designed to send a signal when there is a significant impact, California Highway Patrol’s Golden Gate Air Operations Unit Sgt. Rich Bookbinder said this morning.

Fog has prevented an air search this morning but when it clears the CHP’s Golden Gate Air Operations Unit will search the coordinates where the signals were received, Bookbinder said.

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