Boats...............................?

In the 19th century, did state governments own boats

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What kind of boats are generally used for snorkeling trips in the Caribbean?

You know when you are on vacation in the Caribbean and different companies offer snorkeling trips? What types of boats are generally used to take people out on these trips? Are there public companies that run these businesses or are they small private companies that own just one boat?

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If tuned to the correct frequency could a boats radio communicate with a aircraft?

Could a boats radio communicate with a small aircraft like a Cessna 172, and also vice versa. Could an aircraft radio communicate with a boat if tuned to the correct frequency. The example boat would be something like a Fairline Targa 47.

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