A quick-release securing device is constructed of nylon strap having an openable loop at one end, and snap hook at the other end. The distance between the openable loop and the snap hook, and the circumference of the openable loop, is adjustable. The loop can be opened and closed using a buckle. A supplemental strap may be employed for releasably attaching items, such as boat fenders, to the securing device.

A pole-less cover assembly includes a cover member positionable over a structure and formed of an essentially impermeable material, and an integrated gutter system including a material section coupled with the cover member and formed of a porous material and a gutter disposed below the material section. Among other advantages, the pole-less cover assembly eliminates conventional tent poles required for existing boat covers, thereby reducing cost and facilitating installation.

The protective cover as described will protect the outer surface of a vessel from debris that may strike the vessel either in the water or during sporting events such as fishing. Any damage to a boat is typically expensive and time consuming and is generally to be avoided by the boat owner.

A tether control system for an inspection vehicle operable in a housing having a liquid medium is disclosed in the present application. The tether system includes a tether connected between the inspection vehicle and an electronic controller. A controllable buoyancy system associated with the tether is operable for moving the tether in a desired location. The controllable buoyancy system includes one or more floating bodies having a propulsion system and one or more buoyant elements having variable buoyancy capabilities.

A tether control system for an inspection vehicle operable in a housing having a liquid medium is disclosed in the present application. The tether system includes a tether connected between the inspection vehicle and an electronic controller. A controllable buoyancy system associated with the tether is operable for moving the tether in a desired location. The controllable buoyancy system includes one or more floating bodies having a propulsion system and one or more buoyant elements having variable buoyancy capabilities.

An electric field gradient sensor is presented, having a sensor body having an outer surface; and a plurality of electrodes distributed over the outer surface, each electrode having an electrode surface facing outward from the surface. The plurality of electrodes are arranged forming a plurality of electrode pairs, each electrode pair formed by a first electrode and a second electrode located on opposite sides of the sensor body. This sensor enables three-dimensional measurements of the electric field gradient along structures located in an electrically conductive medium, such as subsea structures, for example for monitoring the cathodic protection of such structure.

The invention relates to a propeller arrangement in a cathodic protection system for a marine vessel with a marine propulsion system, which cathodic protection system comprises a direct current power source with a positive terminal. The propulsion system comprises at least one driveline housing at least partially submerged in water; a torque transmitting drive shaft extending out of the driveline housing; and at least one propeller mounted on the drive shaft. According to the invention, the at least one propeller is electrically isolated from its drive shaft. Each electrically isolated propeller is electrically connected to a slip ring connector, which slip ring connector is in electrical connection with the positive terminal. The invention further relates to a vessel provided with such a propeller arrangement.

The present invention refers to an automated painting system on oil ships, being executed by a mobile platform and an oscillating arm. The assembly only works due to the control of cables, winders and wheels. This approach is aimed at painting large vertical walls. The painting deck suspension uses four cables, each connected to a pivot on the mobile platform, and two fixed pivots plus four winders. The winders contain a servo motor in a synchronous serial network. The cables are made of reduced-weight polyethylene. Each cable is connected exclusively to one winder. Suspension is achieved with the aid of two adapted cranes and initialization through the addition of a giraffe-type crane.

An anti-fouling arrangement in a marine vessel with a marine propulsion system, the propulsion system comprising at least one driveline housing, a torque transmitting drive shaft extending out of the driveline housing, and at least one propeller mounted on the drive shaft. The at least one propeller is electrically isolated from its drive shaft, wherein each electrically isolated propeller is connected to a positive terminal of a direct current power source, and each metallic component to be protected against fouling is connected to a negative terminal of the direct current power source. A control unit is arranged to regulate the voltage and current output from the direct current power source.

A fender mounting assembly includes a backing plate and a branch. The backing plate is configured to attach to a slip wall to mount the fender mounting assembly to the slip wall. The branch is configured to hold a fender a predetermined distance away from the slip wall. The branch extends from the backing plate and includes a first section and a second section. The first section has a first end and a second end. The first end is attached to the backing plate. The second section has a third end and a fourth end. The third end is attached to the second end of the first section. When the fender mounting assembly is attached to the slip wall in an upright position via the backing plate, the second section of the branch extends downwardly from the first section of the branch.