A tug (11) comprising a deck having an aft deck (16), a central deck (12) and a forward deck (15) and a rotatable towing installation (13) disposed on the central deck. The towing installation and central deck are sloping upwards from the aft deck to the forward deck with respect to a horizontal plane. The upward sloping angle () of the towing installation is at least 5 degrees. The design provides free towing all around in the horizontal plane in combination with sufficient bow height and buoyancy and in addition below deck space for e.g. additional accommodation.

A tug (11) comprising a deck having an aft deck (16), a central deck (12) and a forward deck (15) and a rotatable towing installation (13) disposed on the central deck. The towing installation and central deck are sloping upwards from the aft deck to the forward deck with respect to a horizontal plane. The upward sloping angle () of the towing installation is at least 5 degrees. The design provides free towing all around in the horizontal plane in combination with sufficient bow height and buoyancy and in addition below deck space for e.g. additional accommodation.

A restraining device, such as a bolt, pin, or latch, removably secures a connector sleeve to a U-bolt, such as a tow-rope-eyelet on the bow of a boat hull. The connector sleeve is machined with an internal cavity having surfaces and dimension that correspond to outer surfaces of the U-bolt. The sleeve contains holes through which the restraining device passes after the sleeve has been slid over the U-bolt such that the restraining device, while installed, prevents the sleeve from sliding back off of the U-bolt. The sleeve also includes accessory mount holes to receive restraining devices that attach an accessory, such as a ladder, to the sleeve and thus to the boat via the sleeve that has been secured thereto. The sleeve may provide for set screws to snug the sleeve to the U-bolt if clearance exists between surfaces of the cavity and the U-bolt.

A vessel for towing another vessel comprises a hull, a tow cable coupled to the hull, a hook having a first leg fixed to a free end of the cable, a second leg including a free end and a hook bottom. The first and second legs form an opening for receiving a rope located at the vessel and launched from another vessel. The first and second legs extend in a main plane. A rope positioning system positions a rope and a hook support for the hook with respect to each other such that the rope extends in transverse direction of the main plane at the opening of the hook when the hook is linked to the hook support. A rope pressing system presses the rope the hook towards the hook bottom when the hook is linked to the hook support, creating a clamping force between the legs and the rope.

A vessel for towing another vessel comprises a hull, a tow cable coupled to the hull, a hook having a first leg fixed to a free end of the cable, a second leg including a free end and a hook bottom. The first and second legs form an opening for receiving a rope located at the vessel and launched from another vessel. The first and second legs extend in a main plane. A rope positioning system positions a rope and a hook support for the hook with respect to each other such that the rope extends in transverse direction of the main plane at the opening of the hook when the hook is linked to the hook support. A rope pressing system presses the rope the hook towards the hook bottom when the hook is linked to the hook support, creating a clamping force between the legs and the rope.

The towable device having a cover and looped tow strap includes one or more toroidal inflatable tubes surrounded by an abrasion and puncture resistant cover. The cover tightly wraps around the inflated tube(s) to support and contain the tube(s). A top surface of the cover defines openings around the central passageway created by each toroidal tube to allow a rider to enter and occupy the space within the passageway. A lower surface of the cover provides a continuous surface to accommodate sliding during use and support a rider positioned within the center of each tube. A tow strap wraps around a circumference of at least one of the tubes within the cover and extends out a front of the cover for attachment to a towing device.

The towable device having a cover and looped tow strap includes one or more toroidal inflatable tubes surrounded by an abrasion and puncture resistant cover. The cover tightly wraps around the inflated tube(s) to support and contain the tube(s). A top surface of the cover defines openings around the central passageway created by each toroidal tube to allow a rider to enter and occupy the space within the passageway. A lower surface of the cover provides a continuous surface to accommodate sliding during use and support a rider positioned within the center of each tube. A tow strap wraps around a circumference of at least one of the tubes within the cover and extends out a front of the cover for attachment to a towing device.

An all around towing system (33) for a tug (31) comprising a heavy plate (40) mounted on a deck of the tug, an upper rail segment (42) and a lower rail segment (44) disposed on the upper and lower surfaces of an outer edge of the heavy plate, respectively, a carriage (46) movable along the upper and lower rail segments, a set of bearing wheels (47, 48) arranged for guiding the carriage along the upper and lower rail segments, characterized in that the heavy plate further comprises respective upper and lower grooves (43, 45) on the upper and lower surfaces of the heavy plate, and in that the upper and lower rail segments are respectively mounted in the upper and lower grooves of the heavy plate.

A multi-functional aquatic vehicle comprises a main body. The main body comprises: a propulsion system, comprising at least one propeller for changing a motion attitude of the main body; a camera system, comprising at least one camera; a communication system, comprising a signal receiving module for receiving an external signal detected by the aquatic vehicle and a signal transmitting module for transmitting a signal to an external control system; and a control system, for controlling an operating state of the propulsion system, adjusting a capturing angle of the camera system and controlling internal and external communication of the communication system. A towing hook device comprises: a driving system, a connecting mechanism and a towing hook mechanism. The driving system drives the connecting mechanism to rotate such that the towing hook mechanism turns over or rotates to release a load.

A multi-functional aquatic vehicle comprises a main body. The main body comprises: a propulsion system, comprising at least one propeller for changing a motion attitude of the main body; a camera system, comprising at least one camera; a communication system, comprising a signal receiving module for receiving an external signal detected by the aquatic vehicle and a signal transmitting module for transmitting a signal to an external control system; and a control system, for controlling an operating state of the propulsion system, adjusting a capturing angle of the camera system and controlling internal and external communication of the communication system. A towing hook device comprises: a driving system, a connecting mechanism and a towing hook mechanism. The driving system drives the connecting mechanism to rotate such that the towing hook mechanism turns over or rotates to release a load.