Almost anything is repairable. Question is, how hard will it be to
repair and is it worth it or is the
boat worth it.
Can't say for sure from photos but the piece looks pretty rusted. I have cut into really rusty iron before to find strong, solid metal inside but have also seen pieces like your
photo that were nothing but flakes of rust.
First question, how hard is it to reach that spot? Do you have to tear the floor out or just
lift a couple of boards. If it's under the
mast at the very least I assume you have to pull the mast. If you can pull the mast and easily access the whole area to pull out the rusted bits then it's a
DIY project if you are moderately skilled. Not really high tech or high skilled
work. You could go to a local welding shop and have them fab up a replacement for a couple hundred more or less. I might consider having the replacement made of something other than iron.
If it looks like a more difficult
repair then the next question is how attached to the
boat are you? Are you willing to invest what it will cost and is the boat worth it?