LNG (liquified natural gas) vessel

(shipping) An ocean vessel designed to transport natural gas that has been cooled at high pressure and extremely low temperature (-260ºF/-162ºC) until it contracts into a liquid. LNG compresses to 1/600th its original volume.
LNG vessels have large spherical storage tanks positioned half below and half above the deck.
The LNG is loaded and unloaded through pumps at specialized terminals. After unloading, the liquid is turned back into gas and fed into pipelines for distribution.
Although LNG is a dangerous cargo, LNG vessels have an exceptional safety record, primarily because they are staffed with the best officers and crews available.
U.S. LNG Vessel Note: Due to the dangerous nature of the cargo, the U.S. Coast Guard coordinates protection for each trip to a U.S. LNG port, including helicopter patrol, police divers, marine patrol, environmental police, firefighting tugs, city police boats, and Coast Guard vessels. Bridges are closed as tankers pass underneath. An established zone of security extends 500 yards on each side, two miles ahead, and a mile behind the tanker.

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