We leave in a few weeks for our first cruise, so I basically know nothing. If the itinerary says "1:00-5:30." does that mean that you have to be on the boat no later than 5:30 p.m., or does it mean the boat leaves at 5:30 p.m. so you better be on the boat no later than 5:00? Or....(and I do not want to push it) it means you could probably stroll up at 5:50 p.m. and be fine since they really aren't planning to leave until 6:30 p.m., but you do so at your own risk.
It means the boat leaves at 5:30 pm. As long as you get to the ship entrance b/4 then, you should be fine.
Mike