Re: Sleeping underway risk
I registered so I could reply to this.
I've raced and cruised offshore several thousand miles, some of it single-handed and did the same in the Pacific Northwest inland salt waters for years. I've been there when boats hit rocks, logs and sand bottoms.
I would never sleep head-forward. You can make all the silly hypothetical arguments you want, but I'd prefer to risk having my feet slammed against the bulkhead than my head.