the image to become featureless. By
bringing the camera down beneath
this layer the unit is able to provide the
firefighter with a clearer picture of the
scene ahead.
1.4.7
Windows and Polished
Surfaces
Glass is not transparent to long
wavelength infrared energy and it is
not possible for the operator to use
the camera to look through a window.
A white window would indicate that
the window itself is relatively warm
and may be being heated by a fire
behind it. Just as we see reflections in
glass under normal circumstances, it is
possible that the camera can detect
infrared reflections in glass, mirrors
and polished or painted surfaces. Care
must be taken to ensure that the
image seen is not simply a reflection.
Experience will give the operator
added confidence.
1.4.8
Control of Water Streams/jets
When viewed through the ARGUS
camera, water streams from hose reels
will appear black against the
background scene. The control and
aim of water flow can be monitored
by viewing the flow and its effect on
the fire through the camera. It may be
necessary, if employing a water wall,
to drop the wall momentarily to view
the effects of the extinguishing
stream.
1.4.9
Smoke Types
The ARGUS will provide vision through
all types of smoke and steam.
1.4.10
Lens Cleaning During
Operation
The camera lens, like the BA visor, may
become obscured during use. The lens
may be cleaned with a glove or cloth if
necessary.
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