This is a clip of an audio recording of a quarry dive. The hydrophone is sitting approximately 5 metres under the water against the side of the rocks. I could not get the microphone any further under as I was seven metres or so above on a mini-cliff which meant throwing the microphone in from height. Boddam Quarry is a fresh-water training site for dive clubs, so at this point there was six divers in total in the water.
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