The present disclosure relates to a pump system including a pump and a liquid detection sensor or a flow sensor for sensing liquid presence or liquid flow. The water pump system also includes a controller that interfaces with the liquid detection sensor or flow sensor and uses data from the liquid detection sensor or the flow sensor to prevent the pump from being damaged under a run-dry condition.

An outer drive protection arrangement is attachable to a marine vessel while not immersed in water. The arrangement comprises a rim portion arranged in contact with at least a transom surface and surrounding at least one outer drive and a protective cover attached to the rim portion and enclosing a volume encompassing the at least one outer drive, in order to provide a protective gaseous environment inside the cover. The environment contained within the cover is circulated and maintained at a predetermined atmospheric condition by means of a source of conditioned gas.

An outer drive protection arrangement is attachable to a marine vessel while not immersed in water. The arrangement comprises a rim portion arranged in contact with at least a transom surface and surrounding at least one outer drive and a protective cover attached to the rim portion and enclosing a volume encompassing the at least one outer drive, in order to provide a protective gaseous environment inside the cover. The environment contained within the cover is circulated and maintained at a predetermined atmospheric condition by means of a source of conditioned gas.

Provided is a ventilating apparatus for a drill ship, which allows a drill ship sailing around an arctic region to maintain appropriate temperature and pressure. The ventilating apparatus for the drill ship includes: a derrick forming an enclosed space blocked from the exterior; a moonpool formed under the derrick; an air supply device supplying outside air to the moonpool or the derrick; and an air exhaust device exhausting the supplied outside air out of the top of the derrick.

Provided is a ventilating apparatus for a drill ship, which allows a drill ship sailing around an arctic region to maintain appropriate temperature and pressure. The ventilating apparatus for the drill ship includes: a derrick forming an enclosed space blocked from the exterior; a moonpool formed under the derrick; an air supply device supplying outside air to the moonpool or the derrick; and an air exhaust device exhausting the supplied outside air out of the top of the derrick.

A marine vessel can include a tank configured to be at least partially submerged in water during normal operations. The marine vessel can also include a vent pipe disposed within the hull, where the vent pipe has a first end and a second end, where the first end of the vent pipe extends above the water, where the second end of the vent pipe is disposed in a tank in the hull, and where the vent pipe is sized along its length between the first end and the second end to allow an inspection apparatus to pass therethrough.

A marine vessel can include a tank configured to be at least partially submerged in water during normal operations. The marine vessel can also include a vent pipe disposed within the hull, where the vent pipe has a first end and a second end, where the first end of the vent pipe extends above the water, where the second end of the vent pipe is disposed in a tank in the hull, and where the vent pipe is sized along its length between the first end and the second end to allow an inspection apparatus to pass therethrough.

A portable powered ventilator to provide fresh air inflow to an enclosed space such as a covered boat. A powered ventilator includes a fan, located within a fan housing assembly that is connected to a duct. The duct is flexible and semi-rigid, which allows it to be formed into a desired shape suitable. The duct can be shaped to a longitudinal compact form for storage. The fan can be connected to a solar panel via a long cord, enabling the solar panel to be placed away from the fan. The solar panel can be bordered with foam rubber to protect it from damage. The solar panel can have an attached adjustable strap to secure the solar panel. Fresh air is drawn into the fan housing assembly and expelled through the duct into the covered enclosed space, thereby drying the boat interior and inhibiting the formation of mold and mildew.

A portable powered ventilator to provide fresh air inflow to an enclosed space such as a covered boat. A powered ventilator includes a fan, located within a fan housing assembly that is connected to a duct. The duct is flexible and semi-rigid, which allows it to be formed into a desired shape suitable. The duct can be shaped to a longitudinal compact form for storage. The fan can be connected to a solar panel via a long cord, enabling the solar panel to be placed away from the fan. The solar panel can be bordered with foam rubber to protect it from damage. The solar panel can have an attached adjustable strap to secure the solar panel. Fresh air is drawn into the fan housing assembly and expelled through the duct into the covered enclosed space, thereby drying the boat interior and inhibiting the formation of mold and mildew.

A thermal system for a marine vessel includes a thermal liquid circuit; a pump system for circulating a thermal liquid in the thermal liquid circuit; a number of thermal consumers; and a control device for controlling the pump system. The thermal consumers are arranged in parallel in the thermal liquid circuit, and the thermal consumers are arranged in series with respective Pressure Independent Control Valves (PICVs). A differential pressure sensor is adapted to sense a differential pressure indicative for the differential pressure over a critical one of the Pressure Independent Control Valves, and a signal from the differential pressure sensor is used by the control device as basis for controlling the pump system.