What the heck could have caused this?

[sazarac]

Originally Posted by jsc7

Bluefish

Kraken.

[toddster8]

My keel had a couple of those on it, first time I hauled out. One low, one high. Plus, when I ground it all down to bare glass, (encapsulated keel) there was some old bondo or something in there that looked like a previous repair of the same thing.
Gotta be rode-wrap. “Running in to something” would take out the rudder first.
Wasn’t too hard to fix.

[Flagman101]

Lightning?

[Cadence]

Originally Posted by Flagman101

Lightning?

That sounds plausible.

[JPA Cate]

If it's clean, it is not from something that happened before the bottom painting. So, yes, it may well have happened when the boat was moved when the OP wasn't present. I don't know if it would hold up in small claims court, though. It might be really hard to convince the judge that it wasn't from a keel wrap. The gouge being clean and the rest of the bottom painted is the most logical pointer to something that happened while the boat was being moved. Lead is pretty soft. Had a boat with external lead ballast that got coral stuck in it during a grounding, on a reef.

Ann

[Scaramanga F25]

Just hammer it out and fill with epoxy putty.

[s/v michaela]

Looks like the chain bit into it that connects the stands in the yard when the boys tightened down the chain binder..... thats a pretty thin trailing edge ,, wouldn't take much.....