Noun
catch rope (plural catch ropes)
Alternative form of catch-rope
The rope that a cowboy uses to rope animals, having a loop on one end with which to capture the animal.
A rope or cable that acts as an extra means of securing a tram car or similar conveyance should the main cable break.
A rope attached to something by which it can be easily grabbed.
Source: en.wiktionary.orgcatch-rope