The Mitsui Engineering & Shipbuilding (MES) MAS-RY-011 is a highly reliable Main Engine Remote Control Board (PCB) specifically designed for demanding marine applications. This printed circuit board assembly is engineered to facilitate seamless communication and precise automated control of marine main engines. It features robust NAiS plug-in relays for dependable switching, clear red LED status indicators for real-time system monitoring, and secure screw-type terminal blocks for stable I/O wiring. The board is equipped with dual D-subminiature connectors ensuring uninterrupted communication links, alongside versatile jumper selectors (JP-1 to JP-4) that allow operators to easily configure common lines and normally open contacts (AL-1 to AL-4). Manufactured with a durable double-sided PCB layout, high-quality through-hole components, and standard edge mounting holes, the MAS-RY-011 guarantees long-lasting and safe performance in harsh maritime environments.