I am a new owner of a 1981 J30 that has a few hull cracks toward the starboard quarter right at the waterline (picture is attached). I am planning to launch soon and keep the boat wet all season, so I'm wondering how concerned should I be about the cracks? Can I just seal it myself with a tube of 3M 5200, or is this the sign of something much more involved? I'm planning to get it looked at by someone at the yard, but wanted to get any advice someone might have with a similar repair. Thanks in advance!
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