Viewing enhancing apparatus for visibility impaired fluid, such as turbid
water or a smoke-filled room, includes a fluid-permeable sidewall and a housing
defining a confluence cavity having an axis extending between first and second
housing ends. The housing ends are connected by the sidewall. The second housing
end is open. The sidewall has a proximal end towards the first housing end and
a distal end towards the second housing end. The housing defines a supply cavity
surrounding the sidewall and coupleable to a source of viewing fluid, typically
clear water when operating in a turbid water environment. The sidewall provides
a resistance to flow of the viewing fluid therethrough, the resistance varying
according to the position on the sidewall. The viewing fluid passes through the
confluence cavity and exits the second housing end. This creates a chosen velocity
profile for the viewing fluid exiting the second housing end.
