SCUBA diving dongle / underwater noisemaker

SCUBA diving dongle / underwater noisemaker

thingiverse

A Dongle for SCUBA divers to make noise underwater to attract another divers attention. Depth tested so far to 4M, deeper tests will be updated as and when completed. Requires 2 x 6mm ball bearings - glue one into the indent in the cap, leave the other loose in the main tube, once the first ball bearings glue has set, glue the cap onto the main tube and away you go. Slightly positively buoyant. Lanyard hole at the bottom.

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