In fairness  to the US navy this isn't an unreasonable thing to do in fact it's the obvious thing to do . They  can't cancel a whole phase of war games simply because in the initial stages they lose the assets about which the whole exercise is intended to test. They  can always address the situation with regard to diesel submarines later  (which they did ).

So the British sub was supposed to bang a drum so the American system could find it, try telling the enemy to do this , they will laugh in your face !

My Dad helped build those 'O' Boats in Scott Lithgow Shipyard, Greenock, Scotland in the 60's.

British,  Swedish and Australian diesel electrics have all defeated the defensive screens and scored simulated hits.
However,  that doesn't mean the carrier dies, they are designed to survive multiple hits.
It remains the biggest query of a real modern war how do the carriers survive or how can they be replaced to enable repairs and replacements to ensure continued fleet capability and to date I've seen nothing that indicates that has actually been addressed.  The entire fleet philosophy remains based on asymmetric capability if a belligerent opponent

When Britain was asked to do war games with America and pretend to nuke cities, the first time they pretended to nuke cities with hundreds of fighters and interceptors trying to destroy them.
Because Britain did what the Americans thought was impossible, they asked them to do it again, this time sending up thousands of interceptors, yet once again British VULCANS NUKED  the targets.
Each time they lost, they changed what was allowed to happen; sadly for America, the enemy does not follow what you want to happen.
It seems shipping and subs should be added to this too.

this is why we Canadian always respected British navy. They use their brain more than the military might to solve a problem.  Going forward the US Navy would not have fuel to show off.    Canada own the Uranium that power the US carrier and submarine.  They will need to refresh their Reactor with new Uranium. .

Well i'm sure in the years that followed this they sort of get used to loosing to a UK SSK or SSN.

Common for real 😮😮😮

As usual with this channel, an accurate, if, for British tastes, over-complimentary narrative. Yet one that's regrettably paired in most instances, with an ongoing failure to accompany references to whatever class of British submarine is being alluded to at any given moment with photos that are actually of boats of that class and not an entirely different one. Thus, by 04:19 minutes in, the vid has already included several photos ostensibly representing the Oberon Class SSKs yet none of which is of an "O-Boat" (as they were always referred to in the UK) and some of which seem to be early SSNs, albeit not UK ones. After which the narrative moves on to discuss the first UK SSN (HMS Dreadnought) which DID introduce the earlier UK SSNs classic 'teardrop' hull form. Yet ironically, the narrative on her is accompanied by a photo showing a sub of far more traditional hull form (so is not of any British SSN at all but may be a large-ish postwar SSK of a class predating the "O-Boats".

However, all these minor irritations are far outweighed by this channel's invariable accuracy and straightforward relation of far more important factual details. Here, for example, the 100% accurate remarks about the Tigerfish Heavy Torpedo and the unforgivable reason why its serious flaws continued to be present long after the real causes were entirely clear but were still not corrected. The point made about the C Class SSN, HMS Conqueror's skipper opting to not rely on Tigerfish but to instead use a WW2 vintage design unguided Heavy Torpedo to make his attack on the Argentine cruiser, General Belgrano, is a matter of record too, btw

Exactly which warship is that supposed to be at 0:07? Tiresome AI crap

If it pisses off the Americans, then yes!

To whomever it may concern ;
Let me ask you a question.
WHY do you use inaccurate sketches instead of real pics of the Oberon ??
NONE of your pics are anywhere near the Oberons real profile !

SMARTEN UP !!!

The USSR did not have the stealth capabilities of the RN. War games must be be against similar Soviet subs.  All this proves is that in the unlikely event fighting against the inventive British they would lose large expensive carriers.