The invention provides a light guide element (1300) comprising a light guide (300), wherein the light guide (300) in comprises a first light guide face (301) and a second light guide face (302) with UV radiation transmissive light guide material (305) between the first light guide face (301) and the second light guide face (302), wherein the light guide element (1300) further comprises one or more of: (i) a first layer element (30) in contact with the first light guide face (301), wherein the first layer element (30) is transmissive for UV radiation; and (ii) a second layer element (130) in contact with the second light guide face (301), wherein the second layer element (130) has one or more functionalities selected from the group consisting of (a) reflective for UV radiation, (b) adhesive for adhering the light guide (300) to an object, (c) reinforcing the light guide element (1300), and (d) protective for the light guide (300).

A hull scrubber device for a boat is deployed into an operative mode when the boat travels through the water. The device includes a mounting pole and a flexible hull scrubber head attached to the mounting pole and tethered via a tether rope and a swivel mounting in the hull scrubber head. The device is structured to rotate or spin and hit against the boat hull as the boat moves through the water. The scrubber head is a flat-like spiral disk when in a storage, inoperative mode. This disk assumes the shape of a cylinder when hull scrubber device is fully deployed in the water. Brush elements, felt pad elements, and scraper elements are mounted on an outer edge surface of the hull scrubber head for cleaning the hull. Related methods of cleaning a boat hull are also disclosed.

A hull scrubber device for a boat is deployed into an operative mode when the boat travels through the water. The device includes a mounting pole and a flexible hull scrubber head attached to the mounting pole and tethered via a tether rope and a swivel mounting in the hull scrubber head. The device is structured to rotate or spin and hit against the boat hull as the boat moves through the water. The scrubber head is a flat-like spiral disk when in a storage, inoperative mode. This disk assumes the shape of a cylinder when hull scrubber device is fully deployed in the water. Brush elements, felt pad elements, and scraper elements are mounted on an outer edge surface of the hull scrubber head for cleaning the hull. Related methods of cleaning a boat hull are also disclosed.

An electric current supply system (20) is designed to be at least partially submerged in an electrically conductive liquid during operation thereof, and comprises at least one electrically conductive component (21, 22, 23, 24) enveloped in liquid-tight material (40). The component (21, 22, 23, 24) comprises sacrificial material that is capable of reacting electrochemically with the liquid. Further, the component (21, 22, 23, 24) comprises at least one gas trap portion (50) at which the sacrificial material occupies a space in the liquid-tight material (40) that is thereby defined with a gas trapping shape. If, in case of damage to the system (20) in an actual submerged state thereof, the component (21, 22, 23, 24) gets exposed to the liquid, it is achieved that an electrochemical reaction occurring at the exposed area of the component (21, 22, 23, 24) and an outflow of electric current to the liquid are stopped.

A system for blast-cleaning a barge deck, sides, and fittings providing for safety and avoidance of damage to the barge and to persons, where a barge is blast-cleaned with moving blaster units suspended from and traveling along an overhead track beam. In one embodiment, the moving blaster units are each controlled by a person in a moving operator capsule moving in tandem with a moving blaster unit. In another embodiment, the moving blaster units are robotically controlled from a robotic controller which has access to a three-dimensional plan of the barge, communicating with the robotic blaster units via RF antennae, and receiving real-time data from sensors located on each blaster head. Optionally, the system for blast-cleaning a barge can provide blaster-head cameras for real-time remote monitoring of operations and for recording of the operations allowing review of any issue, such as damage, that might arise.

A system for blast-cleaning a barge deck, sides, and fittings providing for safety and avoidance of damage to the barge and to persons, where a barge is blast-cleaned with moving blaster units suspended from and traveling along an overhead track beam. In one embodiment, the moving blaster units are each controlled by a person in a moving operator capsule moving in tandem with a moving blaster unit. In another embodiment, the moving blaster units are robotically controlled from a robotic controller which has access to a three-dimensional plan of the barge, communicating with the robotic blaster units via RF antennae, and receiving real-time data from sensors located on each blaster head. Optionally, the system for blast-cleaning a barge can provide blaster-head cameras for real-time remote monitoring of operations and for recording of the operations allowing review of any issue, such as damage, that might arise.

A system for blast-cleaning a barge deck, sides, and fittings providing for safety and avoidance of damage to the barge and to persons, where a barge is blast-cleaned with moving blaster units suspended from and traveling along an overhead track beam. In one embodiment, the moving blaster units are each controlled by a person in a moving operator capsule moving in tandem with a moving blaster unit. In another embodiment, the moving blaster units are robotically controlled from a robotic controller which has access to a three-dimensional plan of the barge, communicating with the robotic blaster units via RF antennae, and receiving real-time data from sensors located on each blaster head. Optionally, the system for blast-cleaning a barge can provide blaster-head cameras for real-time remote monitoring of operations and for recording of the operations allowing review of any issue, such as damage, that might arise.

A system for blast-cleaning a barge deck, sides, and fittings providing for safety and avoidance of damage to the barge and to persons, where a barge is blast-cleaned with moving blaster units suspended from and traveling along an overhead track beam. In one embodiment, the moving blaster units are each controlled by a person in a moving operator capsule moving in tandem with a moving blaster unit. In another embodiment, the moving blaster units are robotically controlled from a robotic controller which has access to a three-dimensional plan of the barge, communicating with the robotic blaster units via RF antennae, and receiving real-time data from sensors located on each blaster head. Optionally, the system for blast-cleaning a barge can provide blaster-head cameras for real-time remote monitoring of operations and for recording of the operations allowing review of any issue, such as damage, that might arise.

The three operations of hoisting, hoisting, and stopping are automatically performed by using the pulley and the position sensor, so that the general-purpose winch can be easily provided with the auto-tension function. The present invention provides the winch that is inexpensive and has the short delivery time. The three operations of hoisting, hoisting, and stopping are automatically performed by using the pulley and the position sensor, so that the general-purpose winch can be easily provided with the auto-tension function. In two pulleys where wire rope is suspended, the distance between the pulleys can be to changed according to the tension of the wire rope; if the tension increases, the distance between the pulleys decreases and the position sensor operates. As the result, the winch turns to a lowering motion, and the distance between the pulleys increases due to the action of the force of the rodless cylinder; if the tension decreases, the distance between the pulleys increases and another position sensor operates. Therefore, the winch turns into the winding operation and the distance between the pulleys is reduced; the wire rope returning operation and the wire rope pulling operation described above are repeatedly performed due to the operation of the two position sensors, so that the wire rope controls the tension of the constant tension.

Offshore station, having a metal structure, wherein the metal structure (4) has watering regions (6) which are exposed to natural watering (22), wherein the metal structure (4) has sheltered regions (8) which are exposed to natural watering (22) only to a limited extent, if at all, having at least one cleaning device (14), wherein the cleaning device (14) has at least one collecting device (16), at least one line system (18) and outlet openings (20), wherein the collecting device (16) is designed for collecting rainwater (22), wherein the line system (18) is connected to the collecting device (16) and is designed for distributing the rainwater (22), and wherein the outlet openings (20) are designed for flushing the sheltered regions (8) with rainwater (22).