An inflatable hand-held snorkeling float supports a see-through underwater viewing module having a top glass and a bottom glass joined by a collapsible sidewall. A pneumatic chamber surrounds the viewing module. The chamber has a top deck and a bottom deck symmetrically pitched about a central longitudinal axis to form a wedge-shape having an included angle between about 5° and 15°. The top and bottom glasses are also wedge-shaped symmetrically about the longitudinal axis. Handles extend from the sides of the chamber, and are generally centered along a central transverse axis. An optional accessory mount may be affixed to one of the decks adjacent the bow. The accessory mount can be configured with a pair of dedicated connection pads to hold a dive flag and a camera, or two cameras, etc. The configuration of the float provides flotation symmetry when roll-inverted but flotation asymmetry when pitch-inverted.

An inflatable hand-held snorkeling float supports a see-through underwater viewing module having a top glass and a bottom glass joined by a collapsible sidewall. A pneumatic chamber surrounds the viewing module. The chamber has a top deck and a bottom deck symmetrically pitched about a central longitudinal axis to form a wedge-shape having an included angle between about 5° and 15°. The top and bottom glasses are also wedge-shaped symmetrically about the longitudinal axis. Handles extend from the sides of the chamber, and are generally centered along a central transverse axis. An optional accessory mount may be affixed to one of the decks adjacent the bow. The accessory mount can be configured with a pair of dedicated connection pads to hold a dive flag and a camera, or two cameras, etc. The configuration of the float provides flotation symmetry when roll-inverted but flotation asymmetry when pitch-inverted.

An inflatable hand-held snorkeling float supports a see-through underwater viewing module having a top glass and a bottom glass joined by a collapsible sidewall. A pneumatic chamber surrounds the viewing module. The chamber has a top deck and a bottom deck symmetrically pitched about a central longitudinal axis to form a wedge-shape having an included angle between about 5° and 15°. The top and bottom glasses are also wedge-shaped symmetrically about the longitudinal axis. Handles extend from the sides of the chamber, and are generally centered along a central transverse axis. An optional accessory mount may be affixed to one of the decks adjacent the bow. The accessory mount can be configured with a pair of dedicated connection pads to hold a dive flag and a camera, or two cameras, etc. The configuration of the float provides flotation symmetry when roll-inverted but flotation asymmetry when pitch-inverted.

A sailboat, preferably with constrained sail, comprising a hull (22) extending along a main extension direction (X) with a lower surface (23), designated to be partly or fully submerged in water, and an upper surface (24), suitable to accommodate a helmsman (51) in a lying down position and having the head on the backrest (53, 27), a sail (55) fixed on a mast (54) along which axis (Z) extends, characterised in that said mast (54) is engaged in a support (56) directly fixed to the hull (22) and in that said hull (22) hasalong the edges thereof, which extend along the axis (X), an ansa lunata (25) and an ansa lunata (26), respectively, each of which extend along the axis (Y).

A sailboat, preferably with constrained sail, comprising a hull (22) extending along a main extension direction (X) with a lower surface (23), designated to be partly or fully submerged in water, and an upper surface (24), suitable to accommodate a helmsman (51) in a lying down position and having the head on the backrest (53, 27), a sail (55) fixed on a mast (54) along which axis (Z) extends, characterised in that said mast (54) is engaged in a support (56) directly fixed to the hull (22) and in that said hull (22) hasalong the edges thereof, which extend along the axis (X), an ansa lunata (25) and an ansa lunata (26), respectively, each of which extend along the axis (Y).

An above-liquid refraction-correcting buoyant lens device is described. The above-liquid refraction-correcting buoyant lens device includes a viewing portion and a buoyant portion. The viewing portion includes optically transparent material. The buoyant portion can be disposed around an outer edge surface of the viewing portion. In some embodiments, the viewing portion has a viewing area of at least twenty-five square inches. In some embodiments, the viewing portion includes a magnification lens.

An above-liquid refraction-correcting buoyant lens device is described. The above-liquid refraction-correcting buoyant lens device includes a viewing portion and a buoyant portion. The viewing portion includes optically transparent material. The buoyant portion can be disposed around an outer edge surface of the viewing portion. In some embodiments, the viewing portion has a viewing area of at least twenty-five square inches. In some embodiments, the viewing portion includes a magnification lens.

A multipurpose watercraft has a pair of catamaran pontoons supported by way of a transverse control bar at forward regions thereof. The watercraft may have an arched equipment rack framework extending above rearward regions of the pontoons. The watercraft also has a pair of electric motor thrusters located respectively beneath each pontoon and the control bar comprises a pair of controls operable by hand, each control operable to control a respective thruster forwards or backwards. Alternatively, the thrusters may be remotely controlled. This configuration allows an operator to be pulled behind the control bar horizontally between the pontoons, snorkellers to be pulled behind the watercraft for recreational sightseeing and/or for remote-control rescue operations.

An apparatus for viewing marine life is disclosed. The apparatus includes a board configured to float on water and a window positioned in an opening in the board. The opening in a front end of the board and the window includes a transparent top portion, a transparent bottom pane and sides forming a center void. The window is sealed to prevent water from entering the void and the window includes a bottom lip planar with the transparent bottom pane. The apparatus includes a seal positioned in a gap between the window and the opening in the board and above the lip. The seal is inserted from a top surface of the board and provides a friction fit between the window and the opening. The seal includes a flexible resilient material and sized for a friction fit between the opening and the window to prevent movement of the window.

An apparatus for viewing marine life is disclosed. The apparatus includes a board configured to float on water and a window positioned in an opening in the board. The opening in a front end of the board and the window includes a transparent top portion, a transparent bottom pane and sides forming a center void. The window is sealed to prevent water from entering the void and the window includes a bottom lip planar with the transparent bottom pane. The apparatus includes a seal positioned in a gap between the window and the opening in the board and above the lip. The seal is inserted from a top surface of the board and provides a friction fit between the window and the opening. The seal includes a flexible resilient material and sized for a friction fit between the opening and the window to prevent movement of the window.