General
smoke diving
What does smoke diving mean?
Interior structural firefighting through heavy, zero-visibility smoke while breathing off an SCBA (self-contained breathing apparatus). The term frames it like scuba diving — limited air, hostile environment, no vision, follow the line back out. In Scandinavia "smoke diver" (røykdykker / rökdykare) is an actual job certification with a brutal physical standard; in North American slang it just means aggressive interior work.
"Two hours of smoke diving on a contents fire and the rookie still had a quarter tank — kid breathes like a free diver."
Origin
Calque of Scandinavian røykdykker / rökdykker (literally "smoke diver"), a formal certification in Nordic fire services; adopted into English fire-service slang.
Frequently asked questions
What does "smoke diving" mean?
It's crawling deep into a burning building while on air (breathing apparatus) to locate the seat of the fire — or a victim.
How do you use "smoke diving" in a sentence?
"The crew went smoke diving to reach the trapped resident on the top floor."
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