Multi-hull boat e.g. catamaran, for use by e.g. navigator, has water tight deck positioned under connection structure, and non-water tight deck positioned on structure whose lateral parts are opened to bad weather and act as freeing ports

摘要

The boat has a water tight deck (3) positioned under a connection structure (2), in an upper part (1A) of hulls (1), and a non-water tight deck (4) positioned on the connection structure. Lateral parts (2A) of the connection structure are disposed between the two decks and are opened to the bad weather and act as freeing ports. The structure includes two transversal main beams placed at bow and poop of the boat.