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Launching of a Catalan catamaran (a.k.a. #Patí de vela) at Port Olímpic in #Barcelona.
It has no boom, rudder or centerboard, and the skipper steers it by moving along the width and length of the #boat.
This is a local design from the mid-XX century and is easy to find at municipal and private #sailing clubs in Barcelona.
And another one being prepared for launch with two people.
Here you can see the #boat's features (or lack thereof) a bit better.