There are a lot of factors which determine when a ship has to leave port, not the least of which is whether all of the passengers have returned. On our 12/1/01 cruise, we left a guy in St. Thomas who was late returning to the ship. At the Q&A session with the Captain the next day, one of his friends or neighbors grilled the Captain on why he decided to leave rather than waiting for this one person (whose wife and kids were all on board). The Captain was very straightforward, I thought, and explained himself well.
The ship books the pier well in advance, along with any other ships who will be in port that day. On the day we were there, there were 5 ships in port, 3 at WICO (Havensight), and two at Crown Bay. These ships all request to depart at about the same time. The harbormaster schedules the departures and the harbor pilots based on this. If the Magic decides that it needs to stay alongside the pier longer than scheduled, it would throw off the schedule for all of the other ships trying to exit the port. For example, the pilot who is aboard the Magic may go back in to pilot another ship. If he has to wait, then the next ship has to wait, as well. In addition, I am told that it is
very expensive for a ship to remain tied up longer than scheduled. The trip to
Castaway Cay is a long one. One of the reasons that the Magic leaves St. Thomas as early as it does is so that it can get to Castaway Cay in time to give the passengers a full day.
There's a big sign on the gangway which explicitly says when the ship will leave, and
DCL's attitude seems to be that the other 2000+ people on the ship should not have to have their stay at Castaway Cay cut short because someone doesn't pay attention to when they need to return.
I've often seen passengers taken out to the ship on the harbor pilot's launch, but if they're too late for that, then they appear to be out of luck. I would guess that in the cases where they booked an excursion through the cruise line and miss the ship, that they will go back for them. I suspect that they still need to leave on schedule, but will wait for the harbor to clear and then either send a launch in for them, or arrange to have the pilot's launch ferry them out.
bethsg,
Do you know if the ship actually returned to the harbor, or if it just waited outside for the passenger(s) to be transported back to the ship?