A watercraft mounting system that embodies a moving mounting platform and a protective hull cavity which provides protection, prevents damage and improves storage of data collection systems.

Disclosed is a shut-off valve installed in an accommodation chamber regulating entry/exit of air. The shut-off valve includes: a body removably disposed in the accommodation chamber and having multiple air passage holes; a valve stem adapted to be moved vertically along a valve stem insertion hole formed in the body; a disc mounted on a disc engagement portion formed at a lower end of the valve stem to open/close at least one of the multiple air passage holes; a rotor disposed on an upper side of the body to vertically move the valve stem, the rotor being provided with an opening/closing indicator to check opening/closing of the shut-off valve outside the accommodation chamber, wherein the accommodation chamber has an upper wall, a lower wall, and a side wall, the body disposed passing through the upper wall and lower wall of the accommodation chamber, and the disc is located outside the accommodation chamber.

A watercraft comprising a hull, and a polymer layer disposed over an inner side of the hull. The polymer layer has a thickness of between 1 to 5 millimeters, and an elasticity of between 100% and 1200% elongation. The watercraft comprises the hull and the polymer layer, where the interface layer adheres the polymer layer to the inner side of the hull at an adhesion strength of between 0.5 to 1.2 mega-Pascal (MPa).

A watercraft comprising a hull, and a polymer layer disposed over an inner side of the hull. The polymer layer has a thickness of between 1 to 5 millimeters, and an elasticity of between 100% and 1200% elongation. The watercraft comprises the hull and the polymer layer, where the interface layer adheres the polymer layer to the inner side of the hull at an adhesion strength of between 0.5 to 1.2 mega-Pascal (MPa).

The present invention provides an obstruction (10) for mounting along a perimeter of a vessel or marine installation, wherein the vessel or marine installation comprises a deck (51) having a perimeter railing (20) and an upstanding plate (53) along an edge of the deck. The obstruction has an elongate body comprising a longitudinal groove (12) for receiving a lowermost course of rails (203) of the perimeter railing, and a tongue (14) for overhanging the plate (53) on an outboard or seaward side thereof. The tongue comprises a rear surface (142) intended to face in an inboard direction when the obstruction (10) is mounted along the perimeter of the vessel or marine installation. A separation, s, between the rear surface (142) of the tongue and a centreline (X-X) of the longitudinal groove (12) is between 30 and 300 mm, and the centreline (X-X) of the longitudinal groove (12) and the separation, s, together define a plane which subtends an angle, , of between 90 and 135 degrees to the rear surface of the tongue. With such an obstruction, the upstanding plate (53) can be protected, so that the ability of an unauthorized potential boarder to attach a hook to the plate or to gain a handhold on the top edge of the plate are severely impeded. The invention also provides a perimeter protection system (100) comprising a plurality of such obstructions (10a, 10b), a vessel or marine installation comprising a plurality of such obstructions, and a method of protecting a perimeter of a vessel or marine installation using a plurality of such obstructions.

The present invention provides an obstruction (10) for mounting along a perimeter of a vessel or marine installation, wherein the vessel or marine installation comprises a deck (51) having a perimeter railing (20) and an upstanding plate (53) along an edge of the deck. The obstruction has an elongate body comprising a longitudinal groove (12) for receiving a lowermost course of rails (203) of the perimeter railing, and a tongue (14) for overhanging the plate (53) on an outboard or seaward side thereof. The tongue comprises a rear surface (142) intended to face in an inboard direction when the obstruction (10) is mounted along the perimeter of the vessel or marine installation. A separation, s, between the rear surface (142) of the tongue and a centreline (X-X) of the longitudinal groove (12) is between 30 and 300 mm, and the centreline (X-X) of the longitudinal groove (12) and the separation, s, together define a plane which subtends an angle, , of between 90 and 135 degrees to the rear surface of the tongue. With such an obstruction, the upstanding plate (53) can be protected, so that the ability of an unauthorized potential boarder to attach a hook to the plate or to gain a handhold on the top edge of the plate are severely impeded. The invention also provides a perimeter protection system (100) comprising a plurality of such obstructions (10a, 10b), a vessel or marine installation comprising a plurality of such obstructions, and a method of protecting a perimeter of a vessel or marine installation using a plurality of such obstructions.

Apparatuses for protecting the gunnel of a boat are disclosed. In one embodiment, the apparatus may include a planar platform and a first panel attached to, or formed with, the planar platform. The first panel may extend perpendicularly away from the planar platform. The apparatus additionally may include a second panel attached to, or formed with, the planar platform. The second panel may extend perpendicularly away from the planar platform and may be parallel to the first panel. The first and second panels may define a gap therebetween sized to receive the gunnel or rail of the boat to allow the apparatus to be supported on the gunnel or rail of the boat.

Apparatuses for protecting the gunnel of a boat are disclosed. In one embodiment, the apparatus may include a planar platform and a first panel attached to, or formed with, the planar platform. The first panel may extend perpendicularly away from the planar platform. The apparatus additionally may include a second panel attached to, or formed with, the planar platform. The second panel may extend perpendicularly away from the planar platform and may be parallel to the first panel. The first and second panels may define a gap therebetween sized to receive the gunnel or rail of the boat to allow the apparatus to be supported on the gunnel or rail of the boat.

An underwater mobile inspection apparatus capable of inspecting an inspection object on a seafloor while cruising includes a cruising body configured to submerge under-water and cruise along the inspection object so as to not come into contact with the inspection object, a first movable arm provided on the cruising-body, and an inspection tool unit provided on the first movable arm and including at least one of an image-capturing camera for use in visually inspecting the inspection object and a device configured to inspect a wall thickness of the inspection object by using an ultrasonic wave. A controller is configured to, when the cruising-body cruises along the inspection object so as to not come into contact with the inspection object, operate the first movable arm to move the inspection tool unit, such that a positional relationship of the inspection tool unit with the inspection object becomes a predetermined target positional relationship.

A bulkhead protector apparatus is described. The protector is configured to be mounted within a cavity of the sheetpile of a bulkhead in order to prevent waves, wake, and debris from reaching the top portion of the bulkhead, minimizing damage and prolonging the life of the bulkhead. An angled waterguard portion is disposed within the cavity, and is configured to deflect water down and away from the top of the bulkhead. The waterguard portion is mounted to a whaler of the bulkhead via a planar mount portion which is secured to the underside of the whaler of the bulkhead via stainless steel lag bolts.