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From a scuba diving / apnea (free) diving perspective knowing your barometric pressure can let you know your depth - At 1 bar you are at surface level, with each 10m descent you are at a further 1b...
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From a scuba diving / apnea (free) diving perspective knowing your barometric pressure can let you know your depth - At 1 bar you are at surface level, with each 10m descent you are at a further 1b...