Abstract: The steadying device of the present invention is for conveniently stably physically maintaining the firehose-assembly with minimal or no manpower ancillary to firemanship tasks such as fighting fires, evacuating smoke, etc. For example, the steadying device permits the firehose-assembly nozzle to be strategically located and thereafter steadily maintained at a building wall opening solely by virtue of waterstream backpressure exerted through the steadying device winged portion and hence without fireman holding assistance during smoke evacuation periods.