In my opinion, this submariner, if he does exist, has an axe to grind with the Navy. After his first interview with Irvine, he probably realized he was in over his head with his "sea story" and hence his reticence when Irvine tried to get his story on tape.
Well thats just because YOU ARE STILL WORKING for THEM!! You must be part of the COVERUP! {/sarcasm}
Hey, dont you know that on FR we already have amateur aviation and military experts whose knowledge dwarfs yours? What, you worked on a sub? Heck, these guys read an article in popular mechanics about them!
So I guess James Kallstrom also had an axe to grind with the Navy when he told Irvine that the Navy was conducting classified maneuvers under the crash..... Surely you can come up with a better cover story than that.