self-defeating if you are defending the use of "scubadiving"

Or either you could have read the posts and noticed that, in the first four posts, by four different posters, the word dive in one form or another is used at least five times.

As a newly certified diver…

…the navy using scuba divers…

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So far the deepest dives (2300')…

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…the divers in the link you posted…

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from GUE's "Getting Clear on the Basics: The Fundamentals of Technical Diving" book

But that would probably have been too much trouble.