I just finished a Shearwater 17 Hybrid and have had it out 4 or 5 times. I have noticed about a half a cup of water in the bottom of the boat when finished. I assumed it was water from my wet water shoes. I then went without shoes one day, and still had a little water in the boat! The water is not from spray or paddle drips. I added a retractable skeg box when building the boat, and did notice a few air bubbles in the seams along the shear lines. I have no deck rigging or deck hatches. I have waterproof inspection hatches on both bulkheads. I used all the fiberglass, expoxy, and 3 coats of varnish. It really should NOT be leaking, but it looks like it is!!
Any good ideas about finding this small leak? Fill the boat with water and watch where it leaks out? Flashlight on the inside in a dark garage? Some of the joints are transparent... clear expoxy letting light shine through, but still a tight joint. What did I do wrong? Easy fix with fiberglass tape on the inside of joint?