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Aldo,
to my knowledge these computers use radiosignals for communication . The
data transfer can be disturbed by em radiation from unsufficiently
shielded camera strobes, either in the discharge mode ( strong em pulse)
or in the recharge mode ( em interference by switching powersupply or
cascaded diodes to reach the 400 something voltage the discharge
capacitor operates on ).

I do not know the frequency range , or the data protocol, though, but I
assume the latter is a simple digital function, probably some sort of
pulse code, square waved or delta-modulated.
German scientist in the US used these modes of data transfer postwar to
make american weather balloons work, great stuff with vac tube 
technology.
May be a simple receiver and rectifier branched to your notebook,
switchng through transfer protocols , could reveal the code.

If you are interesting in underwater data communication for research
purposes, you should lookout  for Prof. Dr. Uwe Kilsch ( spelling?) ,
the "father of the herrings". He ran  a project in the baltic, where he
was able to steer unmanned scooters via joystick control with the aid of
underwater sonar beacons. These scooters had a great data collection and
transfer functionality .
He is in the US now and involved in a "University for all between 8 and
80, last what I heard.
regards
-Matthias
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