And yes, a lot of time without any post from my side. But you know, “it's better to keep your mouth shut and appear stupid than open it and remove all doubt”
Arg Sub Ops were not relevant for the book.
ARA San Luis was mentioned briefly because the submarine engaged a submerged target on 8 May (with a Mk. 37 torpedo - some details of the attack were in the book) and some post war reports mentioned HMS Onyx was hit that time. The book mentions HMS Onyx was elsewhere, including a nice photo of HMS Onyx in the surface, taken from an AAF Boeing 707 on 21 May (in route to the islands).
ARA Salta was also mentioned in a couple of lines, because the submarine was near a submerged contact, detected from an AAF Fokker F-27.