Any way this isn't a crack?

Biff said
Looks like a crack ,I feel it was from a broken ring it would not be wave’y

Yeah, that was my first thought when I saw it. A scratch would be straight up and down...

Vamisk said
You would think the crack would extend all the way up to the deck surface

Had that thought too, but like Biff said, it's wavy...

This probably wasn't worth posting, I'm pretty sure the block is only good to keep a boat from floating away.