That's a very good point about whether the ship leaves on local time or ship time. We almost missed it once because we didn't know. Thinking we still had an hour to kill we noticed the water taxi to the ships berth had shut down for the evening. Astounded, we recognized at that moment we were on local time and the ship was leaving in a couple of minutes and we were on the other side of the bay. A $25 bribe to the water taxi captain got us to the gangplank just in time.