What’s a Cabin Guarantee (GTY, GUAR)?
A cabin guarantee means that you have reserved a specific cabin category, but you have not yet been assigned a specific cabin. For instance, if you reserved a guaranteed outside cabin on the upper deck, that cabin could be anywhere on the upper deck, and it’s possible that you could receive an upgrade. You will be assigned a specific cabin during embarkation; occasionally you will be notified of your cabin number in advance.