Maritime Activity Reports, Inc. 3D model of the tank system. Image care of PASSER Marine DNV has granted an Approval In Principle (AIP) to PASSER Marine for the development of a new LNG fuel tank insulation system. The new concept is designed for prismatic ‘type B’ LNG tanks - which according to IMO rules require a partial secondary barrier - and includes a leakage detection system capable of safely managing and containing fuel leaks. "The system we have developed is cost-effective and production-friendly,” said Svein Konradsen, COO of PASSER Marine AS. “The pandemic has been challenging for many companies and for the development of this particular design. The required testing has been difficult to finalize due to testing interruptions and limited possibilities to travel, but finally we have been able to submit the necessary documentation which I am very pleased to say was accepted by DNV.”