Velsheda can put up an incredible 9, 000 square feet of sail, more than twice as much as modern Cup boats, and accelerate to 13 knots in a heartbeat.

FORBES: Two Sheets to the Wind

The rule tended to favor narrow designs with deep keels and towering masts to carry the thousands of square feet of sail needed to push the heavy boats through the waves.

FORBES: Magazine Article

With a 52-foot mast, Deuce carries 840 square feet of sail, better than 12 times that of the more common, ubiquitous DN class of iceboat (named for a design contest sponsored by the Detroit News in the 1930s).

FORBES: Shiver Me Timbers

Sail goes more directly for Square's jugular, using its own plug-in dongle to handle major credit card payments in your local coffee shop or a mid-sized outlet.

ENGADGET: VeriFone outs Sail mobile payment system, gives Square the evil eye