If you refer to the red jobbie its a mizzen staysail.
I was on a boat last weekend using one. It later served as a second foresail flying free off a spinaker halyard.
Mizzen staysail I think , looks to be sheeted to the mizzen boom, I would have expected it to the hull as it would back wind the mizzen. Any better offers?
Mine has "mizen gennaker" on the bag, so I guess that's what North Sails call it and what the yanks call it.
I've have seen them called mizzen staysails before, but only in an "old gaffer" context.
Don't think I've seen the term staysail applied to offwind sails whereas a mizzen gennaker is only for off wind use. I've found mine quite powerful (it adds a knot) but only useful at a very limited range of wind angles.
FWYCC, in italian is called "Carbonera" which means more or less "full of coal", as in old time boats it stayed (yep, a stay sail) over the kitchen chimney, thus getting rather blackish with the smoke.
I have a Genica that I fly from the mizzen like that.
The one you show is a lot flatter cut than mine.
God knows what you call a sail flown in that position /forums/images/graemlins/confused.gif