Mitsui O.S.K. Lines, Ltd. announced that its Propeller Boss Cap Fins (PBCF), sold by its group company MOL Techno-Trade, Ltd. was certified as the “Best-selling Energy-Saving Ship Appendage Brand (Cumulative)”, by Guinness World Records, and received the official certificate on December 23, 2021.This award is based on the cumulative 3,748 PBCFs sold (the sales record with 3,516 vessels including twin-screw vessels equipped with PBCF) as of the end of December 2020.PBCF was co-developed by MOL, West Japan Fluid Engineering Laboratory Co., Ltd., and Nakashima Propeller Co., Ltd.