Roll-On/Roll-Off 6 (RO/RO) : A form of cargo handling utilizing a vessel designed to load or unload cargo by using wheeled vehicles that roll on or roll off
NFPA 307 Standard for the Construction and Fire Protection of Marine Terminals, Piers, and Wharves, 2000 ed. https://www.nfpa.org/assets/files/AboutTheCodes/30 7/307-A2005-ROC.pdf, (Std: Const and Fr Prac of Mrn Term , Piers, and Wharves - Amer) {295 NFC}