The acronyms used in diving.

  • MOD – Maximum Operating Depth

    MOD or Maximum Operating Depth counted in meters is the maximum depth at which a mixture of gas becomes unsuitable for breathing. The high partial pressure of oxygen might lead to seizures and convulsion. It is not used in regular air diving but taught in any enriched air courses or in mixed gases courses in … Read more

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  • MSW – Metre Sea Water

    MSW or Metre Sea Water is the unit used in metric to measure the pressure divers are exposed to. For every meter of sea water the pressure is theoretically 0.1bar and is equal to 3.26336 fsw.

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  • NDL – No Decompression Limit

    The NDL or No Decompression Limit is a period of time that a diver can stay according to the depth before decompression is required. The NDL is used in recreational diving to calculate the maximum time a diver can stay and is used when planning dive. Dive computers will calculate this limit at set interval … Read more

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