Struggling out of the water
at the end of a dive. This diving was in the days before
all-in-one BCD's that are put on like jackets, instead a separate
ABLJ (Adjustable buoyancy Life Jackets) were worn with separate
back-packs to hold the bottle, ABLJ,s had a small air bottle
separate from the main air supply and could be breathed from
in an emergency
You may also notice that the
demand valve is twin hose and not single hose (octopus rigs
were still extreme exotica, not to become the norm for a good
many years). Twin hose rigs had the advantage of being far less
prone to icing up in extreme cold conditions and so were used
pretty much exclusively in the winter and certainly on under-ice
dives. Single hose valves had a tendency to ice-up and free-flow
when it got very cold, they could be used without problem in
the summer months when sea temperatures rose to maybe +1 or
+2C, from the -2C of winter, but the small difference was enough.
These days, the technology has progressed and low temperature
single hoses are far more reliable.
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