A canopy extension system is cooperable with a support structure and includes a canopy arm securable pivotably to the support structure and a roller arm securable pivotably to the support structure. A roller is secured on the roller arm. A canopy is connected to the canopy arm at a distal end, is connected adjacent the support structure at a proximal end, and is connected to the roller between the distal end and the proximal end. A variation connects the canopy arm to a radar arch or the like with a spring-biased secondary canopy arm.

Described herein are examples of buoyancy supplements. A buoyancy supplement may include a system including a front flotation portion including a front deck having a front surface, a rear flotation portion including a rear deck having a rear surface. One or both front and rear surfaces having an accessory attachment point, a through-hole substantially parallel to the front or rear surface, a mounting apparatus, a tie-down anchor, and a first and second runner each having a first end configured to attach to the front flotation portion and a second end configured to attach to the rear flotation portion. The front flotation portion and the rear flotation portion may be configured to attach to a float tube.

Described herein are watercraft comprising a hull comprising a first hull assembly, and a second hull assembly opposite the first hull assembly and parallel to the first hull assembly; and a frame configured to couple the first hull assembly to the second hull assembly. In some embodiments, the first hull assembly comprises a first quarter hull coupled to a second quarter hull, and the second hull assembly comprises a third quarter hull coupled to a fourth quarter hull. In some embodiments, the first and third quarter hulls are substantially reflectively duplicative of the second and fourth quarter hulls. In some embodiments, the first hull assembly is substantially reflectively symmetrical to the second hull assembly. Various embodiments may further include a roof comprising one or more energy harvesting arrays thereon. The roof may be movable, in various embodiments, between a closed configuration and an open configuration.

Described herein are watercraft comprising a hull comprising a first hull assembly, and a second hull assembly opposite the first hull assembly and parallel to the first hull assembly; and a frame configured to couple the first hull assembly to the second hull assembly. In some embodiments, the first hull assembly comprises a first quarter hull coupled to a second quarter hull, and the second hull assembly comprises a third quarter hull coupled to a fourth quarter hull. In some embodiments, the first and third quarter hulls are substantially reflectively duplicative of the second and fourth quarter hulls. In some embodiments, the first hull assembly is substantially reflectively symmetrical to the second hull assembly. Various embodiments may further include a roof comprising one or more energy harvesting arrays thereon. The roof may be movable, in various embodiments, between a closed configuration and an open configuration.