Ministryofgiraffes
Contributor
*edited*
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I'm pretty sure that is a mini-split unit in the upper right corner of Joaz's picture,
These allow in room AC with their own controller, if it is working. I've never been on a live aboard, but if I was in your position , I would try to get the best room money could buy.( probably better maintained ) Make sure you talk to the head guy when you are booking the trip to let him know you are not just being picky.