This movie was on in the late 70’s on tv. The opening scene shows a sailor who puts a six pack of beer in the water to cool it off but a native girl laughs at him because the water is a hot spring. He then decides to use Navy discards to build a resort at the spring.
“Lt. Robin Crusoe, U.S.N.”(1966)?
Lt. Robin Crusoe, U.S.N.
http://imdb.com/rg/an_share/title/title/tt0060640/