Oh, so that’s why Cryptonomicon has so much detail/plot points about submarine cable laying!
Stephenson discussed this a bit in the Long Now launch event[0] for "Polostan" and more or less confirmed what you suspect. He also went on to say that he has learned to reel that in and avoid those "rabbit holes". He avoids such digressions in Polostan, in my opinion to the detriment of the book.