The invention relates to a movable fin assembly, which includes a housing attachable to an underside of a watercraft and a rotation and pivoting mechanism. The mechanism positioned inside the housing and movable about two axes of rotation. The mechanism further has a fin locating position, thereby a fin provided at the fin locating position is capable of moving about the two axes of rotation via the mechanism, such that the fin's toe angle and camber angle changes when moving through the water. The invention further extends to an interchangeable self-aligning fin and static fin kit which includes a rotation and pivoting mechanism and a static member shaped and dimensioned to correspond with an interior of the housing. The static member and the rotation and pivoting mechanism interchangeably receivable by the housing in order to selectively provide a dynamic or static fin on the underside of the watercraft.

A floatable apparatus includes a floatable body defining a longitudinal axis parallel with the length of the floatable body, a supporting member positioned under the floatable body for exerting a lifting force onto the floatable apparatus and a coupling assembly coupling the floatable body to the supporting member. The coupling assembly includes a base adapted to secure to the floatable body and a joint adapted to secure to the supporting member. The joint is detachably attached to the base and movable from a first position at which the joint is pivotable about and detachable from the base and a second position at which the joint abuts and is secured to the base. A coupling assembly for a floatable apparatus with a floatable body under which a supporting member is positioned for exerting a lifting force onto the floatable apparatus is also provided.

A fin mount for an inflatable watercraft is an apparatus used as a universal fin box that connects a variety of fins. The apparatus includes a clamp and a fin. The clamp mounts the fin into a fin box-receiving hole of an inflatable watercraft. The clamp includes a lower press, an upper press, and a length-adjustable fastener. The lower press and the upper press seal the fin box-receiving hole. The lower press and the upper press tighten together with the length-adjustable fastener. The lower press and the upper press tensionably tether to each other by the length-adjustable fastener. The apparatus further includes a fin-attachment mechanism that secures the fin into the lower press. The fin removably attaches into a fin-receiving slot of the lower press. The apparatus further includes a plurality of lower counterforts and a plurality of upper counterforts which structurally reinforce the lower press and the upper press.

A fin mount for an inflatable watercraft is an apparatus used as a universal fin box that connects a variety of fins. The apparatus includes a clamp and a fin. The clamp mounts the fin into a fin box-receiving hole of an inflatable watercraft. The clamp includes a lower press, an upper press, and a length-adjustable fastener. The lower press and the upper press seal the fin box-receiving hole. The lower press and the upper press tighten together with the length-adjustable fastener. The lower press and the upper press tensionably tether to each other by the length-adjustable fastener. The apparatus further includes a fin-attachment mechanism that secures the fin into the lower press. The fin removably attaches into a fin-receiving slot of the lower press. The apparatus further includes a plurality of lower counterforts and a plurality of upper counterforts which structurally reinforce the lower press and the upper press.

A retractable fin watercraft accessory that provides steering and tracking for a watercraft such as stand-up paddle boards. The retractable fin system gently retracts as it comes in contact with subsurface objects such as rocks, logs and such, allowing the watercraft to freely pass over the object. The system includes a sloped leading edge which can more easily slide past an obstacle. The retractable fin system simply attaches to the watercraft's existing fin mounting box and can be removed from the watercraft without altering the original state of the watercraft prior to being attached. No drilling, welding, gluing or other such custom fabrication is required. The system allows for quick interchangeability between the retractable fin and various rigid style fins, depending on the user's preferences.

A retractable fin watercraft accessory that provides steering and tracking for a watercraft such as stand-up paddle boards. The retractable fin system gently retracts as it comes in contact with subsurface objects such as rocks, logs and such, allowing the watercraft to freely pass over the object. The system includes a sloped leading edge which can more easily slide past an obstacle. The retractable fin system simply attaches to the watercraft's existing fin mounting box and can be removed from the watercraft without altering the original state of the watercraft prior to being attached. No drilling, welding, gluing or other such custom fabrication is required. The system allows for quick interchangeability between the retractable fin and various rigid style fins, depending on the user's preferences.

The present invention provides a board mountable system for filming underwater video. The inventive board mountable system can be mounted to the underside of water vehicles for incorporating a camera for filming from an underwater perspective. The inventive board mountable system is shaped to minimize drag as a result of the mounted camera or camera system. Embodiments of the inventive system includes a fin shaped housing for holding a camera or camera system. In certain embodiments, the fin is removably attached to the water vehicle, such as a surf board, where the fin housing can be swapped with other fins being used with the water vehicle for controlling the direction of a watersports board in motion. These embodiments of the inventive system further include a connection means for connecting the fin to the underside of a water vessel.

The present invention provides a board mountable system for filming underwater video. The inventive board mountable system can be mounted to the underside of water vehicles for incorporating a camera for filming from an underwater perspective. The inventive board mountable system is shaped to minimize drag as a result of the mounted camera or camera system. Embodiments of the inventive system includes a fin shaped housing for holding a camera or camera system. In certain embodiments, the fin is removably attached to the water vehicle, such as a surf board, where the fin housing can be swapped with other fins being used with the water vehicle for controlling the direction of a watersports board in motion. These embodiments of the inventive system further include a connection means for connecting the fin to the underside of a water vessel.

Watersport board fins with fin retention systems and associated watersport boards and methods. A fin includes a hydrodynamic blade and a fin base extending from the hydrodynamic blade. The hydrodynamic blade defines a fin plane and includes a leading edge, a trailing edge, and a foil surface. The fin further includes a fin retention system with a selective retention system that includes a retainer and an actuator coupled to the retainer via a pivot shaft. The actuator forms a portion of the hydrodynamic blade when the selective retention system is in a locked configuration and is configured to rotate away from the fin plane when the selective retention system transitions from the locked configuration to an unlocked configuration. The retainer is configured to rotate away from the fin plane when the selective retention system transitions from the unlocked configuration to the locked configuration.

Watersport board fins with fin retention systems and associated watersport boards and methods. A fin includes a hydrodynamic blade and a fin base extending from the hydrodynamic blade. The hydrodynamic blade defines a fin plane and includes a leading edge, a trailing edge, and a foil surface. The fin further includes a fin retention system with a selective retention system that includes a retainer and an actuator coupled to the retainer via a pivot shaft. The actuator forms a portion of the hydrodynamic blade when the selective retention system is in a locked configuration and is configured to rotate away from the fin plane when the selective retention system transitions from the locked configuration to an unlocked configuration. The retainer is configured to rotate away from the fin plane when the selective retention system transitions from the unlocked configuration to the locked configuration.