I am looking at a Hunter 25.5 in pretty good shape overall for a 1985, the only thing of concern on the entire boat is this damage I noticed in the photo above. The owner has a fantastic reputation from what I have gathered and seems to be one of the most reliable guys for partially restored older sailboats. I brought it up to him, he said he noticed it right away when he originally was buying it, took it out and sailed it in strong winds and sat watching for movement. Says there was none and he has sailed it weekly for the past 4 years with no addition cracking or signs of problems with the mast. He is not sure how the damage got there without having other signs of a structural failure. This photo is looking up from the vbirth, wood is the bulk head separating living area. Deck has no signs of damage around mast. Is this something I should worry about? How could one dig into whether this is serious or not?