2013EN ISO 8311:2013 Refrigerated hydrocarbon and non-petroleum based liquefied gaseous fuels - Calibration of membrane tanks and independent prismatic tanks in ships - Manual and internal electro-optical distance-ranging methods
1995EN ISO 8311:1995 Refrigerated Light Hydrocarbon Fluids - Calibration of Membrane Tanks and Independent Prismatic Tanks in Ships - Physical Measurement