Refrigerated hydrocarbon & nonpetroleum based liquefied gaseous fuels. General requirements for automatic tank gauges. Automatic tank gauges for liquefied petroleum & chemical gases on board marine carriers & floating storage Liquid-level measurement, Liquid-level indicators, Tanks (containers), Refrigeration, Petroleum products, Liquefied gases, Liquefied natural gas, Liquefied petroleum gas, Ships, Water transport engineering, Measurement, Installation, Safety measures, Accuracy, Verification