This vessel is of the catamaran type, comprising two spaced-apart parallel hulls (1, 2) connected by a floor (3) capable of receiving a load, and characterised in that the said movable ramp (4) consists of a front part of the said floor (3) lying between the two hulls (1, 2), and the said floor or deck (3) constitutes a continuous surface from one edge of the vessel to the other. IMAGE
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