Delivered to the US Navy September 28, 1956, this is one of six Otters that flew their first 10 years with VX-6 in the Antarctic. 144670 flew the last US Navy Otter flight in the Antarctic January 23, 1966. It was then transferred to the Naval Test Pilot's School at Patuxent River NAS, MD where it has been based ever since. It is the last Otter in military service in the world.