Answer is in the photo. I can't attach it here, but I uploaded it to a file hosting. link below! Good Luck!
tinyurl.com/wpazsebu
Triangular sail developed by Arab or Indian merchants which was eventually adopted by European ship owners to improve the maneuverability of their ships. It could catch crosswinds and be used to drive a ship along its chosen course. The captains of caravels and galleons used this type of sail in conjunction with several other kinds of sails to cross the Atlantic and Pacific Oceans.
Maybe you should draw a guy in a car buckling up and a sign saying click it or ticket