Through the STW ‘Perspective Programme’, a major public-private cooperation named SLING has been created. The SLING consortium comprises the technology foundation STW, four top Dutch universities, representatives from the LNG, shipping and shipbuilding industry, engineering companies and MARIN. SLING aims to plug the gaps in the industry’s knowledge about new technology for LNG tanks with crucial cost saving potential. The key to designing cost-effective LNG tanks is a shift to a first-principle approach to assess the dominant design loads, i.e. sloshing impacts. The current design method relies on sloshing model tests and requires a calibration based on operational feedback, which however does not yet exist for new applications. This prevents new tank designs which maximise use of the ship’s capacity by optimising tank geometry, and minimising Boil-Off-Gas by optimising the strength of the tank. SLING brings together an unparallelled, multidisciplinary team to draw-up a first-principle approach to assess sloshing by disentangling the complex sloshing physics through advanced experiments and numerical simulations.