If your sails are up, you may be considered not under command,
If your sails are down and you're sitting there with the engine stopped could you be considered not under command? In the lake here if somebody is out drifting in their boat fishing everybody just avoids them which makes perfect sense. Is there a day shape for NUC, and is it proper to display it if you walked away from your stopped engine for fishing or something? There isn't a rule for boats which are drifting like there is for manually powered, wind powered, and engine powered is there?
If you stop the engine and paddle a few times, do you become a manually powered boat?
If you had a steel hulled 27' with 1/8" plating, how much would that improve things in the event of a collision with a lobster boat?