I tried attaching a picture but was unable too. I made the file size smaller but still didn't help. I have a Capri 18 and on the bottom of the fixed keel it has a line on it that starts about 12 inches from the front of the keel, the line goes up 12" from the bottom and runs the whole length of the keel except for the first 12" and on the back 12" the line goes all the way to the top. below the line is discolored and it runs the same pattern on both sides. It is almost like there is water in there. Is the keel hollow or is it solid? If you give me your e-mail address, I will e-mail a picture, I just can't seem to post a picture here.