L to R: MG Abernathy, Bauman, Pratt, Rice, LaVelle, Williams

Yerba Buena Island in SF Bay “had light house to guide boats clear of SF fog”

Radio Station NPG, Yerba Buena Island, Telephoto Shot from Ferry Building

NPG, View from East End of Island. “Training station abandoned 23 June 1923…”

“Area lower L is now E mouth of Bay Bridge Tunnel”

“Barracks, mess hall L… at R penthouse shields Kolster RDF antenna mechanism…”

Central Mast from W End of Island

Typical Antenna Support

Central Mast and Antenna from E

“Barrage loop antenna, beamed on ‘Great Circle Route’ to NPM and NPO”

“Loop used for reception, Pearl Harbor, w. barrage circuit for telegraphone reception”

Telephone Transmitter Building and Antenna

Telephone Receiver, Shortwave Transmitter, and Radio Compass Buildings