deluge gun
deluge gun is a water cannon.
Also recorded as deluge guns; fire monitor; fire monitors; master stream; master streams; deck gun.
Overview
Equipment used in firefighting.
In detail
deluge gun is a water cannon.
Sources
Each source is named with the standing the house places on it, so the evidence can be weighed rather than taken on trust.
reference work · Reputable secondary · Wikipedia
“Deluge gun”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q338513: deluge gun
Consult the source