Roll-on/roll-off 5 (ro/ro) : A form of cargo handling utilizing a vessel designed to load or unload cargo that rolls, such as automobiles or tractor trailer units
NFPA 1405 Guide for Land-Based Fire Fighters Who Respond to Marine Vessel Fires, 2001 ed. http://www.nfpa.org/assets/files/AboutTheCodes/140 5/1405-F2005-ROP.pdf, (Guide: Land-Based Fr Fightr Who Respond to Mrn Vssl - Amer) {396 NFC}