The Commercial Diver Network
homing pigeons do the trick they did it across the namibian border all u need is 50 pigeons for an early retirement.
South African diamond diver for 9 years, on Namibian border.
Uh, good luck. We had 3 divers taken hostage in less than a year.
Unless you plan on using hidden cameras, no lighting, and no production...I wouldn't go around carelessly waving high-priced equipment around.