Could be worse OP, could be a movie about the North Koreans successfully invading America, you know, North Korea, a country that barely has a navy and who’s Air Force is mostly old Migs from several decades ago, a country who starts threatening their neighbors whenever their food supply runs low because their chubby leader eats too much.

At least the original version of the movie was against the Russians while they were a super power.

a country that barely has a navy

North Korea has the largest submarine fleet of any nation. Of course most of those are old diesel subs, but the point still stands.

Diesel subs have some advantages over others, some distinct disadvantages too, but a few advantages

Name one advantage that diesel subs have over modern nuclear subs? Lol

Diesel subs are loud AF from my understanding, and loud subs are dead subs according to my understanding of modern day submersible warfare.

They are loud when they recharge, they are slow compared to nuclear subs and they carry much less armaments.

On the other hand, when they are on battery power modern diesels can be much quieter than nuclear subs, they are much cheaper and smaller so ideal for operations in coastal waters. Which is why many (also western countries) rely on them for coastal defense.

Economics wise: You can trade 3 diesel subs against a nuclear subs or a large warship and still come out ahead cost/effort wise.

How long do you think 1950’s era batteries last? Like in what world do you think “a 1950’s diesel on battery power surely outclasses a modem nuclear sub”? GTFO with that bullshit, lol.

A sub on battery power is essentially in free fall depending on their ballast situation, they’re not going anywhere because they would have to turn their loud ass engines on to go somewhere, which would then alert the entire modern navy they would be up against.

Which is why many (also western countries) rely on them for coastal defense.

No the countries that still use those just don’t have enough money to maintain a nuclear sub fleet for what’s essentially their coast guard, it’s cost efficiency not “better”.

All of your points are just deep stretches in vain attempts to be the “well ackschully!” Guy, or to be the contrarian throwing shit at the wall to see what sticks.

the countries that still use those just don’t have enough money to maintain a nuclear sub fleet

IRC the French have at least one diesel sub, the SMX-Ocean Range 30,000km.

They also have modern battery tech, the money and the tech to maintain/build nuclear subs. They have existing nuclear subs. The SMX-Ocean is actually quite modern. 2017 I think. Certainly more modern than most existing nuclear subs.

it’s cost efficiency not “better”.

Here's an article which explains why modern diesel subs can be quieter than nuclear subs:

https://navalpost.com/nuclear-submarines-diesel-electric-submarines-noise-level/

they are slow compared to nuclear subs

I googled. 20 knots for the SMX-Ocean. 25 for France's nuclear subs. Not a huge difference.

IRC the French have at least one diesel sub, the SMX-Ocean Range 30,000km.

Wait so you honestly think they’re going 30,000 km on battery power?

Do you not get that submarines are just like cars? You generate power through the engines and that power is stored on battery to power the electrical systems and serve as a backup, battery power is not going to power the whole entire sub and magically move the sub quietly through the water, that’s not how these things work.

My point is, you’re not going to be able to move your sub at all on battery power, at some point you will have to turn on those loud ass engines in order to move your sub, which will absolutely alert every modern sub to your location.

Wait so you honestly think they’re going 30,000 km on battery power

Obviously not, as the article I linked to mentions the range is limited in electric mode.

battery power is not going to power the whole entire sub and magically move the sub quietly through the water,

It will, but the range is limited. Electricity and batteries aren't magic. We also use them to move cars.

that’s how nuclear subs work.

You should read the article I linked to above. Current nuclear submarines often aren't perfectly silent. In fact, they can be louder than a modern diesel sub running in battery only mode.

Which is likely why the French, who do have nuclear subs, chose to build a diesel sub anyway while simultaneously also working on quieter nuclear subs.

From your article:

Diesel Electric Submarines Diesel generator machinery can cause a great deal of noise. Diesel electrics are only quiet when operating in electric mode.

In fact, diesel boats must raise a snorkel to have intake fresh air for combustion when operating the diesel recharging the batteries and is then visible to the world.

u212a todaro class submarine pietro venuti U212A Todaro class submarine Pietro Venuti You cannot run silently with the diesels running and charging the electrics, you can only run silently in the electric-only mode, submerged. And because that’s off batteries, your submerged endurance is limited.

Diesel electric submarines only use diesel mode when travelling on surface, or snorkeling. However, there is the Stirling engine submarine, that can run its two propulsion systems totally submerged.

The works on making nuclear boats quieter

So you agree that diesel submarines can be quieter than nuclear subs when operating in electric mode, although their range is limited.

That's good.

I thought this was turning into one of those reddit level discussions, where people refuse to accept they were wrong, because they'd rather 'win' an argument by misrepresenting what the person they're debating actually said, than have a nuanced discussion

Bro I just copied and pasted a literal quote from your own article saying otherwise, you are your own Reddit moment rn.