Anyone remember "The Aquanauts" series?

[SEALAB Author Ben H.]

My cousin just gave me a copy of this yesterday, picked up at a garage sale - No. 11 in the "The Aquanauts" series. Anyone remember these books, from circa early 1970s? Not sure Bill Martin & co. featured in "Operation Mermaid" and the other stories actually fit the definition of "aquanaut" that grew out of the U.S. Navy's SEALAB program, as explained in my (nonfiction) book, but, hey. . .will have to read and find out. . .
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[Mr. Willoughby]

I read a couple of those when I was kid...

 

[covediver]

Just ordered the complete set. looking forward to reading these. they kind of come at the end of the men's adventure genre.