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

Someone else mentioned that they raffle off tickets to be on it when it does. I remember there were QR codes posted to be entered in the drawing for the July 4th sailing.