There are conventions in the cave-diving community on how lines are left/maintained/removed, which prevent caves from being strewn with abandoned lines. Much l

There are conventions in the cave-diving community on how lines are left/maintained/removed, which prevent caves from being strewn with abandoned lines. Much like the IT community adopt coding-standards for a project, the cave-diving community has line-placement standards. Whilst the standards vary from location to location (and are in general localised to the requirements of the location's environment), they are generally well "policed" and exceptions are addressed.