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Now if the transponder could be elevated
to say, 20m, the range would be
significantly increased.
This can be achieved by attaching the
transponder to a helium lift envelope securely
tethered to the survival craft. The
envelope would also be coloured day-glo
orange for better daytime visibility and
carry a flashing beacon for location at
night.
The envelope is easily deployed (hand
winch); stored in a waterproof pouch; securely
attached to the craft; and simply
inflated. Constructed from strong
polyurethane to give maximum air time
the 2m dia envelope can be easily
retrofitted to most survival craft.
In
high seas the survival craft may only be
visible for brief periods as it crests
the waves, where as the envelope if
deployed at a suitable height will
always be visible.
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