[Camel Joe]

5 Knots? That’s really not much to brag about, and you will never ever make a diesel sub as quiet as a nuke, moving parts make noise, and we can hear you when the pistons pump from so far away it will make you sick to think about it.

[rottndog]

You think nucs don’t have moving parts?

[rottndog]

BTW, 5 knots is irrelevant, if no one knows you’re there.

[sukhoi-30mki]

Err,a sub’s diesel operates when she’s on the surface or when she’s snorkelling.It’s batteries run when it’s down there & they are always quieter than your average nuke boat.An average battery can go upto 3 days at slow speed & virtually be undetected.Enough to give any opposing commander sleepless nights.

The 5 Knots I mentioned is to get the maximum endurance,which for a new German sub would be ,
around 25+ days ~ 5 knots.& This endurance is just based on it’s fuel cells,leaving out it’s diesel-battery arrangement.

[Charles Martel]

...you will never ever make a diesel sub as quiet as a nuke, moving parts make noise, and we can hear you when the pistons pump from so far away it will make you sick to think about it.

Yes, piston engines are loud... but air-independent fuel cell technology is quieter than a nuclear reactor. The French Skorpene boats will be fitted with that system.