In 2009 and 2010 the Spanish scene - with many of the world's leading acro pilots - had their own National Championships held. They used boat towing as an art of take-off including the synchro category wherefore they invented a double towing system for 2 pilots being connected to the same towing boat.
These contests were also FAI 2 category events and open for international pilots.
The chronology of the Spanish Championships:
2009 - Revoluttion (Senterada)
2010 - Revoluttion (Pantano de Sant Antoni, Pobla de Segur)