A Submariner
A submarine.
someone who sails.
Tosser
They are referred to as four-cornered sails.
They were referred to as "four-cornered" sails.
I don't think there is another name other than blade.
Sails are attached to the mast.
Below
A submarine is an undersea boat, or submersible.
The Nautilus was Fulton's submarine.
plunger is a fitting name for submarine because , it is under the water
A yachter is another word for a yachtsman, someone who sails in yachts.