Quote:
Originally Posted by AnnieK
There was someone on the news this morning who said that if they tapped too often or constantly the noise wouldn't be picked up as easily. If there is a sustained effort that seems to follow a pattern - ie every 30 minutes they it is more likely to be human rather than just ocean noises or sea life.
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id probably go for every 10 minutes
if i was about to suffocate to death!