as long as you have it packed in a luggage case I see no problem with this. When I worked on Holland America ships I owned a bicycle and I carried it right off the gangway all the time. I was not the only one.
This was before they had x-ray security, etc, but they deal with wheel chairs and motorized scooters all the time, so I really do not foresee a problem.
I think it is a great idea.
By the way - if you love biking many smaller, expeditionary cruise lines have biking tours in several cities, and some ships even carry bikes on the ships (especially river boats). In Europe a bicycle can be one of the best ways to see a port stop, especially if it is not a major city.
My husband did this once. No special bike case, as we did not have to fly, we drove to the port. This was pre-9/11, so I don't know if things have changed. It was on Carnival. He only did it once, however, because of the amount of space it took up in the cabin. From then on, he rented bikes in ports.
"Safety Concerns: Due to "Safety Concerns", the following items cannot be utilized on board nor are permitted on board:
Scooters (unless medically necessary)
Scuba Tanks (empty or full)"
There is a whole list of stuff there, I just quoted the bike section. The interesting one was : Fish Caught on Fishing Expeditions: The fish cannot be brought on board; it must be shipped home. I don't know if I want to eat a fish I mailed home a few weeks ago.....
Thanks for looking up that information. It would be sad to get to the pier with the bike and not have it allowed onboard. It would almost ruin the cruise trying to find somewhere to store it onshore while you went on the cruise.
In regard to shipping fish: It isn't as bad as you think. It is packed in dry ice and shipped express. I've shipped fish from Mexico and Hawaii and it arrived in Minnesota perfectly fine.
It's the same way inland restaurants receive their fresh fish.
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"There is a great difference between being well traveled and just having been to many places." ~Me