A catamaran has a pair of spaced-apart pontoons, each having a forward tapered end and a rearward end. An underwing is affixed to the pontoons and spans therebetween. A platform is pivotally connected to the underwing forward end and/or rearward end and conforms to the pontoons at their forward tapered end or their rearward end, respectively. A power assembly is connected to the platform for lowering or raising the platform from a stowed position to a plurality of working positions--including positions below the waterline--of the catamaran and for raising or lowering the platform back to the stowed position. For protecting the craft from damage, the platform also can carry a deployable extending ramp formed from a pair of spaced-apart floating pontoons with a walkway extending between the floating pontoons. A novel fendering system for the craft also is disclosed.

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