lift-on/lift-off
{{Short description|Type of cargo ship}}
{{Refimprove|date=November 2015}}
File:Feeder ship Maersk Ferrol.jpg
Lift-on/lift-off (LoLo, sometimes LOLO, LO/LO or Lo/Lo){{cite web|url=http://www.globalsecurity.org/military/systems/ship/lo-lo.htm|title=Lift-on/Lift-off (LO/LO) Ships|publisher=GlobalSecurity.org|accessdate=13 April 2014}} ships are cargo ships with on-board cranes
to load and unload cargo. Ships with cranes or other cargo handling equipment on-board are also termed geared vessels.
As container ships usually have no on-board cranes or other mechanism to load or unload their cargo, they are therefore dependent on dockside container cranes to load and unload. However lift-on/lift-off vessels can load and unload their own cargo unassisted. Lift-on/lift-off vessels can operate out of docks with no dockside cargo handling equipment.
"In May 2010 the Office of Naval Research (ONR) conducted a ... at-sea demonstration of their Large Vessel Interface Lift-on/Lift-off (LVI Lo/Lo) crane system in sea state 3 conditions. The LVI Lo/Lo demonstrator is an advanced motion-compensated, at-sea cargo transfer system. The embedded technologies combine to provide tagline free six degrees-of-freedom control of the payload."[https://www.youtube.com/watch?v=JvId272itb0 Large Vessel Interface Lift-on/Lift-off (LVI Lo/Lo) crane system], youtube.com, 21 October 2010, retrieved 20 December 2017. – Video (2:30). @1:40/2:30 the compensation movement is shown in fast motion.