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A regas vessel is an LNG carrier with onboard LNG vaporisers. Depending on distance and volumes the vessel can be permanent/semipermanent and receive cargos from a dedicated shuttle vessel, or it can sail to pick up its own cargos.

LNG is pumped from the tanks and sent to regasification units mounted on the deck of the vessel. Pressure is boosted by large cryogenic LNG pumps. Steam generated by auxillary boilers in the vessel main engine room or sea water through a sea water inlet produces the heat necessary to regasify the LNG in the regasification unit's heat exchanger. The regasification units design has been developed by Hamworthy Gas Systems Norway.

A request can be offshore-moored or moored to a jetty. If moored offshore regasified LNG is discharged from the FSRU via a turret and swivel through a mooring and unloading buoy connected to a riser and subsea pipeline, designed by APL and based on their North Sea proven STL technology.

Regasified LNG is discharged via a turret and swivel through a mooring and unloading buoy connected to a riser and subsea pipeline, designed by Advanced Production Loading (APL) and based on their North Sea proven STL technology. Two separate buoys will ensure continuous send-out by overlap between arriving and departing SRVs.

A regas vessel may be a conversion or a newbulding. It is also very flexible as can be moved to new locations and it can also be used as a conventional vessel.