Yes, there are several restrictions that should be noted:
Visitors must be at least five years of age to tour vessels.
No strollers are permitted on the ship.
Visitors must be able to walk unassisted without the aid of supporting devices for access on vessels; guests must be physically able to walk through tight spaces and up/down steep ladders – an equivalency experience will be offered if desired.
There are no public restrooms on vessels; restrooms are located on the dock.