RMK NB131 (Miaraka) is an innovative, 91.30-meter-long commercial sailing container vessel built by RMK Marine. Designed by Delta Marine and classified by Bureau Veritas (BV), the vessel aims to reduce carbon dioxide (CO₂) emissions by up to 60% through the use of wind-assisted rigid sail systems. With a breadth of 17.80 meters and a deadweight tonnage (DWT) of 2,400 tons, Miaraka stands as a pioneer in eco-friendly maritime transport, boasting a total capacity of 210 TEU containers, including 40 refrigerated (reefer) units.