Posted January 14th, 2013, 09:37 AM
The problem would be tracking them down. The ship usually has contact with all the tour groups ship's excursions. They usually have no idea what groups are on private tours, who they are with, where they are, etc.
........ in which case its up to the tardy cruisers to phone the ship or ship's land agent - always a contact number in ship's daily newspaper. I guess the ship is much more likely to wait, at least a few minutes, if it's known that a group - or even a solitary passenger - is ten minutes away, rather than simply "missing".
No promises though