In its liquid state, LNG is not explosive and cannot burn. For LNG to burn, it must first vaporize, then mix with air in the proper proportions and then be ignited. In the case of a leak, LNG vaporizes rapidly, turning into a gas (methane plus trace gases), and mixing with air. If this mixture is within the flammable range, there is risk of ignition that would create fire and thermal radiation hazards.
While LNG tankers have sailed over 100 million miles without a shipboard death or even a major accident, Stanley LNG Carriers is taking particular measures in the design, construction and operation of its fleet. Furthermore, Stanley management and crew members receive specialized training in the safe transportation and handling of LNG.
Natural gas is considered the most environmentally friendly fossil fuel, because it has the lowest CO2 emissions per unit of energy and because it is suitable for use in high efficiency combined cycle power stations. On a per mile or kilometer transported basis, emissions from LNG are lower than piped natural gas, which is a particular issue in Europe, where significant amounts of gas are piped several thousand kilometers from Russia.