collision is actually an allision
When a vessel strikes a fixed object with force the vessel is said to have allided or the incident is referred to as an allision rather than a collision. Collision is when neither vessel is fixed in place. I believe a submerged object impact may be a collision.
Skipper is responsible for her/his boat.
It's better to have your enemies inside your tent pissing out than outside your tent pissing in...