Just shows how clueless you flat earthers, fake moon landing loonies are. When you can't even properly read and understand your own sources.The site itself makes the Grumman claim, not the article being discussed, maybe read it again.
This is literally what's written on your posted site.
The following article was published in August 1997 in Media Bypass. The author, James M. Collier, died in 1998. Mr. Collier's text appears in colored roman type. My comments appear indented in white italics intermingled with the text to which they refer. Where I intrude upon Mr. Collier's paragraphing, "[...]" appears.
Now read all the white parts that destroy that stupid article written in blue.