Yes, at least once, maybe twice a year it sails. Meanwhile it’s docked at its own museum the rest of the year - the ship itself is free, but they charge for the museum. I’ve seen it many times

Funny anecdote: when I first met my about to become new in-laws, they came from Washington DC to visit me in Boston for the Fourth of July. I was excited to take them to see the Constitution, both boarding at the museum dock and watching it “sail” down Boston harbor. I must have gone on a bit, due to my excitement …… eventually my about to be new mother-in-law from DC spoke up with not understanding how they could do that with such an historic document, and what would there be to see anyway