inflatable hull configuration and connection for a multihull vessel . the inflatable hulls have a longitudinal structural member fastened to the top of the inflatable hulls , with a central body of the multihull vessel supported on the longitudinal structural members by forward and stern legs . the forward legs support the forward part of the central body through a ball joint that allows the forward legs to rotate as a unit relative to the central body , and have their lower ends attached to the forward part of the longitudinal members , each through a spring supported ball joint . the stern legs are each rigidly coupled to the central body , with their lower ends connected to the aft part of the longitudinal members to allow rotation about a vertical axis and a transverse axis , but not the longitudinal axis . a detailed embodiment is disclosed .