Damage to a boat

Someone is try to tell me I'm liable for dameges

Can you rephrase your question. Use the subject line for a brief description of your question, then give a more detailed explanation in the body of the post.

Based on the limited amount you posted, I would say anyone can sue over anything. Whether they can win depends on whether they can prove you damaged their boat.

Are the claims true, more details about what actually happened to the boat would be helpful.

... depends on whether they can prove you damaged their boat.

And if you did it either intentionally or negligently.