After several more weather patrols , '' Gresham '' departed Alameda on 13 August 1956 , for Vancouver , British Columbia , Canada , via Port Angeles , Washington , on a U.S. Coast Guard Reserve training cruise . On 30 September 1956 , she was relieved from Ocean Station November by cutter USCGC '' Pontchartrain '' ( WPG-70 ) . On 17 October 1956 , '' Pontchartrain '' rescued passengers of Pan American World Airways Flight 6 , the Boeing 377 Stratocruiser '' Sovereign of the Skies '' , which had ditched in the eastern Pacific during a flight from Honolulu to San Francisco , California ; '' Gresham '' left Alameda and rendezvoused with '' Pontchartrain '' at San Francisco Light Station on 19 October 1956 as '' Pontchartrain '' brought in the rescued passengers
Pan American World Airways Flight 6
Pan Am Flight 6
USS Willoughby (AGP-9)