Level gauging onboard LNG carriers is challenging. LNG is the lightest one of all hydrocarbons, and remains liquefied when cooled to -163°C at normal pressure. In this harsh tank environment the choice of gauging method is of decisive importance. When handling liquefied natural gas in a cost-effective and safe way, one must be able to rely on accurate and reliable custody transfer measurement, crucial for establishing accounts payable. Once installed the measuring system must be up running during the whole time between regular dry docking periods.

Radar-based tank gauging is the preferred measurement method to fulfil custody transfer standards.