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They had used them for feet! Hope this helped:)
What else can I help you with?
What is the fin of a pelycosaur?
their sail like fins are to help them with body temperature
Who made the first sail boat?
Sailing has been around since prehistoric times, therefore the name of the person who made the first sail boat is not recorded.
What dinosaur had fins on its back?
It was amargasaurus which was a type of sauropod
Does Jacques cartier like to sail?
he was an explorer! of course he would have liked to sail.
How do you put sail in a sentence?
Like that! If it were sail as in I sailed a cross the sea you could put you are a sailor you can SAIL very well. But if it was sail as in the sail on a ship, you could put the SAIL on the ship was ripped. And so on. Hope I answered your question xx
What do boats generally sail on?
Water like the sea or lakes, but the sails sail on the wind and air. Hope this is the answer you were looking for!
What invention allowed ships to sail into the wind?
Wut made ships sail in the wind was that using a persicet sail or flag will pick up the wind and will push the air out and sail..just like u swinging on a swing 
What did the lateen sail look like?
The lateen sail looks like a triangle. The point is on one side and the base is on the other side. The base of the sail would be parallel to the main mast. A spar at the top of the sail is attached to the mast. It is mainly used on sunfish and other extremely small sailing craft.
What swells out like a sail in the wind?
Paragliding aerofoils.
How where vikings like pirates?
because they sail on ships.
Who did bering sail fior?
because he felt like it
What do battens do on a sail?
Battens help give the sail it's shape. By adding these 'spars' to the sail they control how the sail deforms under loading, resulting in a sail shaped more like a wing and less like a parachute. Battens also allow for a larger sail area, assuming the boom length and mast height remain constant. With a traditional non-battened sail, the largest possible functioning sail is a triangle defined by the ends of the boom and the tip of the mast. With battens, the sail can extend past that line drawn from the back of the boom to the tip of the mast, as the battens will act like cantilevered beams, supporting the sail past the point where tension between the boom and mast can be used. As a result, all non-battened sails are triangles, and almost every decent sail has an arched trailing edge.
