I doubt my recruiter had a clue what an OT did back in 75. The rate was top secret, the stations were remote and we didn't, for the most part, serve our sea duty aboard ship. About as far off the beaten track as I could have gone in the Navy.
The stations were nice, Bermuda, Barbados, Antigua, Grand Turk, Cape Hatteras, Lewes, Nantucket, Hawaii, Point Sur, N. California, Coos Bay, Wales, Newfoundland, Iceland, Adak, Midway......sounded like a Cruise ship itinerary...