After a week of freezing temperatures, the ice in the basin is 4 centimeters (1½ inches) thick.
I was able to crack it by stomping on it hard, a few times. Then I lifted a huge plank of the broken ice and smashed it against the dock to free one of my ropes that had frozen in.
No particular reason, just … I hadn't realised that the end of a rope had blown off my roof and had been dangling in the water. It belongs on my roof.
@PKYo dumb question but does the ice threaten your hull?