If you have mobility issues, that doesn't mean a cruise is out of the question. In fact, it's just the opposite. The key is to plan ahead so you can minimize those challenges. This includes wheelchair-accessible staterooms and transportation, lifts for jacuzzis and swimming pools, and close-captioned TVs. Most cruise lines have an accessibility coordinator to answer questions.
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First, confirm that a wheelchair-accessible stateroom is available. Some ships only have a handful, while a newer ship like the Norwegian Epic has a whopping 42 accessible staterooms.
Holland America was the first line to install wheelchair-accessible tenders, but there may be weight restrictions. And if the weather is rough, the captain has the right to cancel.