Ummm, ran across this piece a while back while working the face of an-early-Vietnam-war rabbit hole.
TLDR - you can operate a submarine, even a nuke, in the Gulf of Thailand. But you should be prepared to walk the fine line between a Naval Unit Citation and a court martial for reckless endangerment if you happen to be the skipper...
https://www.usni.org/magazines/naval-history-magazine/2008/february/sculpins-lost-mission-nuclear-submarine-vietnam-war