A device for establishing an electrical connection between a multiphase distribution grid of a ship and a multiphase supply grid on the land, having an electrical plug unit arranged on the ship and an electrical coupling unit arranged on the land for making electrical contact with the electrical plug unit of the ship, wherein the electrical coupling unit arranged on the land is designed to be able to be moved along at least a partial region of the ship. To create a device for establishing a land power connection of a ship that allows rapid and flexible establishment of electrical contact, it is proposed according to the invention for the electrical coupling unit on the land to be designed to be able to be moved in a manner guided by rails, wherein the electrical coupling unit on the land has a reception and guidance device for the wired plug of the electrical plug unit of the ship.

An operating gas system for an underwater vehicle, particularly for a submarine or an unmanned underwater vehicle, includes a fuel cell system and an operating gas vessel connected in terms of flow to the fuel cell system. In order to achieve simple and efficient storage of boil-off gasses, a gas-receiving device is also provided and is connected to the operating gas vessel. The gas-receiving device contains a sorbent for receiving boil-off gas from the operating gas vessel. The boil-off gas, which is produced in the operating vessel with an operating gas for the fuel cell system and which cannot be consumed directly in the fuel cell reaction, is therefore collected and stored with the aid of the sorbent in the gas-receiving device. A method for operating an operating gas system and an underwater vehicle are also provided.

A motorized watercraft is a vehicle that is used to transport a user across the water. The motorized watercraft includes a floating board, a control unit, at least one electrically accessible system, a power source, and at least one conduit stringer. The floating board allows a user to float above the water. The at least one electrically accessible system may include a propulsion system, lights, or other features. The control unit is mounted to the deck of the floating board and is used to regulate the speed of the propulsion system and may be used to control lights which are mounted into the floating board. The power source is used to provide the energy needed for running the propulsion system and the lights. The conduit stringer runs through the floating board, strengthening the floating board and providing a channel through which wiring may run.

A motorized watercraft is a vehicle that is used to transport a user across the water. The motorized watercraft includes a floating board, a control unit, at least one electrically accessible system, a power source, and at least one conduit stringer. The floating board allows a user to float above the water. The at least one electrically accessible system may include a propulsion system, lights, or other features. The control unit is mounted to the deck of the floating board and is used to regulate the speed of the propulsion system and may be used to control lights which are mounted into the floating board. The power source is used to provide the energy needed for running the propulsion system and the lights. The conduit stringer runs through the floating board, strengthening the floating board and providing a channel through which wiring may run.