Abstract: An inflatable stand up paddleboard having a top surface for supporting a user and a bottom surface for residing on water. The inflatable stand up paddleboard being characterized as having a front end and back end and a longitudinal axis passing between the front and back ends. The inflatable stand up paddleboard is configured to receive at least one beam for stiffening the inflatable stand up paddleboard positioned substantially parallel to the longitudinal axis.

Abstract: An inflatable stand up paddleboard having a top surface for supporting a user and a bottom surface for residing on water. The inflatable stand up paddleboard being characterized as having a front end and back end and a longitudinal axis passing between the front and back ends. The inflatable stand up paddleboard is configured to receive at least one beam for stiffening the inflatable stand up paddleboard positioned substantially parallel to the longitudinal axis.

Abstract: A stiffening spine for use in a selectively inflatable kayak. Inflatable kayaks are characterized as having an elongated pneumatically inflatable peripheral tubes which, when inflated, define a passenger compartment and relatively narrow bow and stem sections. A flexible cover extends between and at least partially encases the elongated pneumatically inflatable peripheral tubes to provide a floor for the kayak. A spine for stiffening the inflatable kayak is provided in the form of a relatively rigid longitudinal member and end caps fitted to both ends thereof. The longitudinal member is sized to be removably inserted within the flexible cover so that when installed, the end caps are positioned proximate the bow and stem sections of the inflatable kayak.

Abstract: A selectively inflatable kayak that includes at least one elongated pneumatically inflatable flexible tube which when inflated defines a passenger compartment and relatively narrow bow and stern sections. A flexible cover extends over the elongated pneumatically inflatable tube extending between and at least partially encasing it to provide an open passenger compartment and floor for the kayak. Cylindrical sheaths are sized to fit over and be received by the elongated pneumatically inflatable tube along the sections of the tube defining the sides of the passenger compartment. Extensions to the flexible cover are also provided at the bow and stern sections of the passenger compartment to drape over and separate the elongated pneumatically inflatable tube from the passenger compartment at those locations.

Abstract: A stiffening spine for use in a selectively inflatable kayak. Inflatable kayaks are characterized as having an elongated pneumatically inflatable peripheral tubes which, when inflated, define a passenger compartment and relatively narrow bow and stem sections. A flexible cover extends between and at least partially encases the elongated pneumatically inflatable peripheral tubes to provide a floor for the kayak. A spine for stiffening the inflatable kayak is provided in the form of a relatively rigid longitudinal member and end caps fitted to both ends thereof. The longitudinal member is sized to be removably inserted within the flexible cover so that when installed, the end caps are positioned proximate the bow and stem sections of the inflatable kayak.

Abstract: A selectively inflatable kayak that includes at least one elongated pneumatically inflatable flexible tube which when inflated defines a passenger compartment and relatively narrow bow and stem sections. A flexible cover extends over the elongated pneumatically inflatable tube extending between and at least partially encasing it to provide an open passenger compartment and floor for the kayak. Cylindrical sheaths are sized to fit over and be received by the elongated pneumatically inflatable tube along the sections of the tube defining the sides of the passenger compartment. Extensions to the flexible cover are also provided at the bow and stem sections of the passenger compartment to drape over and separate the elongated pneumatically inflatable tube from the passenger compartment at those locations.