Just discovered two similar leaks midway back on the port side of the keel, and I'm stumped as to what they are. She's a CSY33 and was on the hard this winter, we had a very mild winter here in Connecticut and dipped below freezing only ~1-2 days this year.
Do these look like run-of-the-mill blisters, or might there be something more significant/structural going on since they appear to share a similar horizontal crack, with what appears to be a black-ish fluid weeping out (I couldn't determine if it's water or oil/diesel, however). Could there have been water that froze in the encapsulated lead within the keel and expanded to cause the small cracks, or do these look less worrisome?
First time I've seen this issue and not quite sure what to make of them...any advice/info/theories would be greatly appreciated, thanks in advance! Photos attached: