AR = Augmented reality? No. Not in your wildest dreams can it do that.
And I say that as one of the most heavily cross-trained individuals in the US Navy, a Submariner, who got an aircraft mechanic's license before joining. You still wouldn't want me ripping the diesel apart. Or diving into the main condensers. Or rewiring the Ballast Control Panel.
You have specialists for a reason.
What the Navy has done is gone from being able to fix individual circuit cards in a system either onboard ship or at the nearest Fleet Tender, to remove and replace the card that isn't working right.
Friend of mine has a no-longer-valid Navy Enlisted Classification, Undocumented Electronic Troubleshooter. He was the guy you called when the troubleshooting manual wasn't giving you a fix. He is quite literally one of 3 people allowed to make changes to procedures involving the digital depth detectors on subs, listed by name in the manual. The other 2 people are engineers at the company that makes the units. He's had to dive into the big Ballast Control Panel to troubleshoot stuff after one boat had a hydraulic rupture in Control. His first day back on a boat, his brand new uniform went from pressed and starched to rags.
That NEC was invalidated in the late 1990s or very early 2000s (we met in 2003, IIRC and it had been invalidated before we met).