A rope carried by a fire fighter only for self-rescue from an extreme situation is called a escape rope.
Escape Rope means a single purpose, single use, emergency escape (Self- rescue) rope which firefighter use. When you struck in a building that is under fire you should crawl and get out of the building as soon as possible. This is the prominent advice one can read in every awareness manuals. The reason to crawl is to reduce the hardness of breathing while escaping from the fire or probably from the smoke.
As soon as fire broke out in a building smoke will start to cover the entire building except the few inches over the floor just because of the warm surrounding air. So, one can escape from the fire easily by crawling.
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