One line diagram for the 24V DC electrical system on a Multi-Purpose Offshore Support Vessel. Shows the distribution layout from battery chargers and batteries through to the various distribution boards like the wheelhouse, engine room, and helideck. Includes specific details for circuit breakers, load capacities in Watts, and feeder cables. You’ll find sections for navigation equipment, GMDSS, steering gear, and emergency lighting. It also tracks the 440V feeds and trasformers coming from the main switchboards. This drawing was originally for a Sealion do Brasil project, so it’s quite specialized for offshore marine environments. everything’s labeled clearly, incl. the sound powered telephone systems and DP controls.