An apparatus (1) for cleaning the outer side of the hull (60) of a marine vessel (50) and for cleaning the wall (70) of cargo holds, the apparatus (1) comprising a housing (2) provided with magnetic continuous tracks (3) at opposing lateral sides of the housing (2), a front wheel (6) and a rear wheel (5) for each of the magnetic continuous tracks (3), each magnetic continuous track (3) comprising a plurality of links (9) interconnected by drive pins (10), the links (9) having an inwardly facing side (18) and an outwardly facing side (19), a guide (40) configured to engage the drive pins (10) for preventing the links (9) in a first portion of the extent of the of at least one of the magnetic continuous tracks (3) between the front wheel (6) and the rear wheel (5) from moving in the direction in which the outwardly facing side (19) faces and a submersible apparatus for cleaning the outer side of the hull of a marine vessel and for cleaning the wall of cargo space in the cargo holds that comprises a watertight housing provided with continuous magnetic tracks at opposing lateral sides of the housing. A watertight housing provided with continuous magnetic tracks at opposing lateral sides of said housing. At least one drive motor in the housing operably connected to at least one continuous magnetic track for driving the continuous magnetic tracks. The housing being provided with a main side between the continuous magnetic tracks.

An apparatus (1) for cleaning the outer side of the hull (60) of a marine vessel (50) and for cleaning the wall (70) of cargo holds, the apparatus (1) comprising a housing (2) provided with magnetic continuous tracks (3) at opposing lateral sides of the housing (2), a front wheel (6) and a rear wheel (5) for each of the magnetic continuous tracks (3), each magnetic continuous track (3) comprising a plurality of links (9) interconnected by drive pins (10), the links (9) having an inwardly facing side (18) and an outwardly facing side (19), a guide (40) configured to engage the drive pins (10) for preventing the links (9) in a first portion of the extent of the of at least one of the magnetic continuous tracks (3) between the front wheel (6) and the rear wheel (5) from moving in the direction in which the outwardly facing side (19) faces and a submersible apparatus for cleaning the outer side of the hull of a marine vessel and for cleaning the wall of cargo space in the cargo holds that comprises a watertight housing provided with continuous magnetic tracks at opposing lateral sides of the housing. A watertight housing provided with continuous magnetic tracks at opposing lateral sides of said housing. At least one drive motor in the housing operably connected to at least one continuous magnetic track for driving the continuous magnetic tracks. The housing being provided with a main side between the continuous magnetic tracks.

Systems for cleaning a storage tank and fluid hydrocarbons stored within the storage tank comprise: a vehicle for transporting the system between sites having said storage tanks; a fluid cleaning circuit mounted with respect to said vehicle for extracting fluid hydrocarbons from the storage tank for cleaning; a settlement tank mounted with respect to said vehicle to be in fluid communication with the fluid cleaning circuit to receive contaminated fluid hydrocarbons for separation by gravity; wherein the fluid cleaning circuit is controllable to clean the fluid hydrocarbons and the storage tank and to dispose of any waste material extracted from the fluid hydrocarbons during the cleaning process and following disposal of the waste material the fluid cleaning circuit is configured to convert the settlement tank into a non-volatile environment prior to the vehicle leaving the site.

Provided herein are methods of drawing out oils and/or fats (e.g., hydrocarbons) from a solid material (such as, e.g., metal or rock, e.g., a hydrocarbon bearing geologic formation). The methods comprise fumigating the solid material with a gas containing chlorine dioxide, thereby drawing out oil and/or fat from the solid material. The methods can be used, e.g., to clean solid materials used in industry and to enhance the recovery of crude oil and/or natural gas from petroleum wells.

One or more spray nozzles are positioned in the ballast tanks of watersports boat to allow application of a hot water spray to the internal surfaces thereof. A water conduit leading between the spray nozzles and a hull connection facilitates supply of water thereto. A pump and heater can be provided on the watersports boat connected in the water conduit to produce the hot water for decontamination onboard. A controller can be used to automate the decontamination regimen.

One or more spray nozzles are positioned in the ballast tanks of watersports boat to allow application of a hot water spray to the internal surfaces thereof. A water conduit leading between the spray nozzles and a hull connection facilitates supply of water thereto. A pump and heater can be provided on the watersports boat connected in the water conduit to produce the hot water for decontamination onboard. A controller can be used to automate the decontamination regimen.