Marshall Islands AiP for Anemoi Rotor Sail Wind Propulsion
The Republic of the Marshall Islands (RMI) Maritime Administrator has awarded an approval in principle (AiP) to Anemoi Marine Technologies for its Rotor Sail systems following a review of two bespoke configurations of the wind propulsion technology.
Rotor Sails, also known as “Flettner” rotors, are vertical cylinders that harness the renewable power of the wind to provide additional forward thrust to the vessel, thereby improving its energy efficiency and reducing carbon emissions.
The RMI Maritime Administrator’s AiP was issued after undertaking a comprehensive review of a 210,000-deadweight-ton Newcastlemax bulk carrier designed by Shanghai Merchant Ship Design & Research Institute (SDARI), thereby validating Anemoi’s four Rotor Sails (measuring 5 by 35 m) with a folding deployment system and six Rotor Sails (measuring 5 by 30 m) with a bespoke rail deployment system.
The review also included a technical assessment of how the installation of Rotor Sails in both configurations will impact the vessel’s Energy Efficiency Design Index (EEDI) calculations, with an estimated improvement of 20 percent for the rail system and 17 percent for the folding deployment system for the vessel’s EEDI.