BAR Technologies and Chartwell Marine have been awarded Approval in Principle (AiP) from the American Bureau of Shipping (ABS) for the design and construction of the new BAR 30 metre crew transfer vessel (CTV). This AiP is a further step towards a Jones Act compliant fleet of offshore wind support vessels for the US market. Securing AiP offers assurance that these the vessel design will be built in-line with specific US requirements. As part of the AiP process, the vessel designs have met criteria from the ABS Rules for Building and Classing High Speed Craft 2020. The CTV makes use of FOSS technology (foil optimised stability system) to enhance seakeeping and manoeuvrability, while reducing vertical acceleration by up to 70% in 2.5m wave heights.