ClassNK issues AiP for OceanWings Rigid Windsail Type WAPS

(Posted on 31/03/25)

ClassNK has issued an approval in principle (AiP) for a Rigid Windsail Type Wind-Assisted Propulsion System (WAPS) developed by OceanWings. The certification confirms its feasibility from regulatory and safety perspectives.

The implementation of WAPS is advancing as a solution for responding to environmental regulations and reducing fuel expenses. When such systems are installed on ships, they are expected to be effective in reducing CO2 emissions through the use of wind power. However, depending on the scale and specifications, risks can arise for the ship’s structure, onboard crew, and the surrounding environment.

ClassNK reviewed the design concept of the system based on its ‘Guidelines for Wind-Assisted Propulsion Systems for Ships (Edition 2.1)’. Upon confirming its conformity to prescribed requirements for structural design, driving and control systems etc., ClassNK issued the AiP.

ClassNK will continually strive to contribute to advanced decarbonization initiatives through safety assessments and more.

At the initial stage of designing or before the specific target ship to be implemented is decided, the design is examined based on the existing regulations such as international conventions and ship classification rules, and an Approval in Principle (AiP) is issued as proof of conformity with requirements. It also prevents rework of regulatory aspects in the post-process, shortens the examination time at the time of class registration, and can be used as a technical basis for external appeal of the design status. For more information, visit our website.