I think I read somewhere Kerry did a few months on a ship in the Gulf of Tonkin, and the rest of his tour on a Swift boat in the Mekong Delta.
I'm sure someone will verify.
"I think I read somewhere Kerry did a few months on a ship in the Gulf of Tonkin, and the rest of his tour on a Swift boat in the Mekong Delta."
The link I just posted covers that time frame as well:
December 1967: Kerry begins his first tour of duty, serving on the guided-missile frigate USS Gridley.
February 1968: With Kerry aboard, the Gridley sails into war to patrol the coast of Vietnam. He never came into contact with the enemy during this time.
June 6, 1968: Kerry's first tour ends as the Gridley returns home.
http://www.boston.com/globe/nation/packages/kerry/timeline.htm I believe I read that Kerry's boat only landed ashore at Vietnam one time during this tour.