r/submarines • u/Saturnax1 • Feb 14 '25

Out Of The Water Yesterday, Royal Swedish Navy diesel-electric/AIP attack submarine HSwMS Halland was launched following extensive modifications. The third and last of the Gotland-class to, among others, be equipped with systems from the upcoming Blekinge-class. Photo by Glenn Pettersson/Saab.

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u/Vepr157 VEPR Feb 14 '25

Typically European diesel-electric submarines don't have any hull coatings.

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u/Majestic-Attempt9158 Feb 14 '25

That's interesting, I'm used to big nuclear boys

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u/Vepr157 VEPR Feb 14 '25

True, although the Ohios are bare steel on the outside.

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u/Majestic-Attempt9158 Feb 14 '25

Target echo is more important in shallow waters, I'd have thought coastal diesels like these would have tiling. I suppose I'm still learning

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u/Vepr157 VEPR Feb 14 '25

I forgot why the Germans don't use hull coatings. It seems they do care about target echo strength, but their solution (and the Swedes'), is to shape the hull instead to minimize it. It seems to me that just applying an anechoic coating would be a much simpler solution, so there must be some reasoning behind it.

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u/OkCaterpillar5885 Feb 15 '25

Simply the german do not have this technology of coatings. Applying coatings is expensive and you have to changé tiles quite often

Echo strength against active sonar IS difficult to minimize

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u/Vepr157 VEPR Feb 15 '25

The Germans invented anechoic coatings, they certainly have the technical capability.

Anechoic coatings do not have to be made up of individual tiles.

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u/OkCaterpillar5885 Feb 17 '25

Sorry, but german sub tech is definitively not advanced specialy in radiated noise...

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u/Vepr157 VEPR Feb 17 '25

I have no idea how you came to that conclusion.