Understand a DIR diver

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[@micheleiuliano6986]

Nice and enjoyable video as usual! Well done Ben.

[@mikloszakar5314]

Guinness is good for you! :-) Cheers!

[@chiranagheorghitaeugeniuth98]

Yeah... each agency tries to introduce their own terms. Sounds a little stupid . and rock bottom... why not sand bottom....

[@bloodymarvelous4790]

Because rock bottom means the absolute lowest. Sand bottom means a seabed or lakebed made of sand.