Originally Posted by waynebow
what about heaving to, and then sleeping
I guess primarily because the ship that runs you down doesn't really discriminate between moving or standing obstructions, it's just a matter timing. And as others are likely to say, heaved to does not mean you're not under way.
The other thing I don't get is why there is a desire to stop the boat while you're sleeping. The more distance you can cover the less time you have to spend out there and the less times you'll be needing sleep. And stopping the boat does not lessen your chances of being run down. If it's safe enough to sleep, it's safe enough to keep moving.