Editing Ladder (section)

===Flexible ladders===
[[File:Riverbend cave.jpg|thumb|upright=1.2|An aluminium ladder being used in [[Horne Lake Caves Provincial Park|Riverbend Cave]], 2006]]
*'''Rope ladders''' or '''Jacob's ladders''' are used where storage space is extremely limited, weight must be kept to a minimum, or in instances where the object to be climbed is too curved to use a rigid ladder. They may have rigid or flexible rungs. Climbing a rope ladder requires more skill than climbing a rigid ladder, because the ladder tends to swing like a [[pendulum]]. Jacob's ladders used on a ship are used mostly for emergencies or for temporary access to the side of a ship.<ref name=Cutler>{{cite book|last=Cutler|first=Deborah W. and Thomas J. Cutler|title=Dictionary of Naval Terms|year=2005|publisher=Naval Institute Press, Annapolis, Maryland|isbn=978-1-59114-150-1|page=122}}</ref> Steel and aluminum wire ladders are sometimes used in [[vertical caving]], having developed from rope ladders with wooden rungs. Flexible ladders are also sometimes used as swim ladders on boats.