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-   -   US carriers in danger! (https://www.subsim.com/radioroom/showthread.php?t=201281)

Skybird 01-08-13 08:26 AM

US carriers in danger!
 
Beware of the Huns coming. :D

According to very few German media reports, U32 will set sail for rendezvous with the USN off the US coast to participate in naval exercises from March on. It will cross the Atlantic with just one stop at the Azores.

The Americans want to see if they now can defend their carrier groups against submarines of the latest generation now. The Germans are focussed on testing a brandnew passive sonarsystem of theirs, and to try new tactics.

Captain and crew expect to be completely invisible for every passive sonar the US can mount against them, they say. They are eager to repeat the success of U24 which in 2001 during excercise JTFEX 01-2 successfully penetrated USN Enteprise's ASW screen and fired green smoke next to the carriers hull, "at collision proximity", as the German article says.

IMO, such exercises are of vital interest for the US, for the Americna side ven more than the German, since in the past the USN has experienced alarming weaknesses against modern submarines of new designs, with the Swedish Gotland having run circles at will around USN units for over one year when the boat was stationed in America by US request for longer practicing opportunity. With the Navy having rang alarm bells last year over a substantial loss of ASW in American naval forces, due to loss of air- and sea-stationed ASW power, and modern submarine technology spreading wild and turning Chinese and Russian boats more and more into dangerous opponents again, and European countries selling their equipment into the Middle East, the loss of capability in ASW indeed is a worrying perspective for the US, considering its new global centre of gravity is in the Western pacific.

The exercising with the German boat will not be an encouraging experience for the USN, I strongly assume - everything else would be a very big surprise. The 212 is at least as undetectable (passively) as the Gotlands are, and also almost undetectable for magnetic sensors. Maximum time for staying underwater is rumoured to be minimum 18 days.

Don't ask me, they gave no pieces on this new German sonar, if you wanted to ask for curiosity. Only that it is passive.


And this boat the Germans want to sell to - Egypt. :dead: :/\\!! :nope:

AVGWarhawk 01-08-13 08:36 AM

The USN ASW has been penetrated at will for decades. Seems there are no improvements. Then again, keeping up with submarine tech and ways to combat it may not be completely possible.

http://www.usstorsk.net/photoalbum/6.../edwards08.jpg


Quote:

Details from Captain Edwards:
"The pictures were taken during a Med deployment in the Fall of '63 or Spring of '64.
Torsk was opposing a transit of a large task force. The carrier CO and the Screen
Commander insisted no green flares (simulated torpedo firing) were sighted and no screen
penetration had taken place. When I produced the photos, both just about wet their pants.
Fred."

ETR3(SS) 01-08-13 09:09 AM

The advantage in ASW is decidedly in favor of the submarine. Surface and air units are good at prosecuting a submerged contact once found, but the problem lies in detection. A CVBG clipping along at 30kts, even 10 kts, makes a hell of a lot of noise thus putting the submarine at a tactical advantage. That's why a CVBG has a submarine escort positioned ahead of it.
I remember training with our own ASW forces. We were restricted in our water space and they were pretty much told where we were from the get go. Even then we managed to "sink" them and that was on an Ohio SSBN!

HundertzehnGustav 01-08-13 09:51 AM

...drumbeat 2k13:D
sink'em all!!

http://uboat.net/boats/u32.htm

Onkel Neal 01-08-13 10:06 AM

:Kaleun_Los:
Quote:

Originally Posted by HundertzehnGustav (Post 1989838)
...drumbeat 2k13:D
sink'em all!!

http://uboat.net/boats/u32.htm


Armistead 01-08-13 10:28 AM

When they know where you are, it may be easy, during war, it take a lot of luck to get a course.

Oberon 01-08-13 12:00 PM

Let's hope that the rules are deployed fairly, and U32 is given ample opportunity to prove her worth.

Good hunting U32! :salute:

Hottentot 01-08-13 02:30 PM

Quote:

Originally Posted by AVGWarhawk (Post 1989808)
The USN ASW has been penetrated at will for decades.

But as is commonly known, all of those cases have been, are and will be brilliant strategic decisions by the USN, which has appeared weaker in peace time than it really is and therefore cunningly fed its enemies false information and created false sense of security for them.

Source: the Internuts.

Cybermat47 01-08-13 02:42 PM

From the name of this thread, and the icon, I thought that Skybird was setting out to plant bombs on US ships :haha:

Takeda Shingen 01-08-13 02:50 PM

Well, the USN hasn't really had a viable widespead submarine opponent since the end of the Cold War, and the lack of attention to that aspect of the training is beginning to show, as the rest of the world has caught up, and in some cases, surpassed us.

The USN still has a formidable ASW presence, but we don't obsess over over it like we did against the Soviets.

TarJak 01-08-13 05:38 PM

Even our "noisy" Collins class boats were successful against both USN surface and submarine assets during excersices some years ago.

http://www.theage.com.au/articles/20...222635806.html
http://www.cuttingedge.org/news_updates/nz1839.htm

Gute jagd U32. I'm sure the results will be similar if not better.

Rhodes 01-08-13 06:18 PM

Our old navy sub, daphné class, was detected as a trawler in US sonars...:D

Hawk66 01-09-13 01:14 PM

It's funny that now F220 Hamburg (AAW FFG, similar like the US AEGIS system) also travels to the east coast to join the CVN Harry S. Truman for 6 months - after some exercises they will be travelling through the Suez canal. (Info about the trip (German language)

So, the Huns do not need always to be feared off ;)

Oberon 01-09-13 01:41 PM

Quote:

Originally Posted by Rhodes (Post 1990050)
Our old navy sub, daphné class, was detected as a trawler in US sonars...:D

https://www.youtube.com/watch?v=7Vae_AkLb4Q

:03:

The Obies also manage to 'sink' a few US carriers in their time, and the Dutch, well:

Quote:

In 1989, naval analyst Norman Polmar wrote in Naval Forces that during NATO s exercise Northern Star, the Dutch submarine Zwaardvis was the only orange (enemy) submarine to successfully stalk and sink a blue (allied) aircraft carrier Ten years later there were reports that the Dutch submarine Walrus had been even more successful in the exercise JTFEX/TMDI99.

During this exercise the Walrus penetrates the U.S. screen and sinks many ships, including the U.S. aircraft carrier Theodore Roosevelt CVN-71. The submarine launches two attacks and manages to sneak away. To celebrate the sinking the crew designed a special T- shirt. Fittingly, the T-shirt depicted the USS Theodore Roosevelt impaled on the tusks of a walrus. It was also reported that the Walrus also sank many of the Roosevelt's escorts, including the nuclear submarine USS Boise, a cruiser, several destroyers and frigates, plus the command ship USS Mount Whitney. The Walrus herself survived the exercise with no damage.


Jimbuna 01-09-13 02:03 PM

I'm confident the German submarine will perform extremely well but in real life hostilities I'd expect a submarine would give a good hint to its whereabouts when launching a weapon and as such the battle group would possibly go nuclear (especially if a carrier were hit) which would mean less accuracy would be needed in said retaliatory response.

Oberon 01-09-13 02:13 PM

Not always, if they do a swim out launch rather than a ram launch then there's less transients, and if the surrounding sonar environment is quite noisy then the launching boat could feasibly hide its position longer than expected. Of course, the escorts will not stop until the attacking boat is destroyed and the SSK will have a limited amount of time it can stay down before they need to snorkel, although the new AIP boats have much longer and if they settle down near some wreckage or in a secluded spot where the bottom bounce of the active sonar helps to mask the sub. Even so, there's a good chance it'll be a one way mission.

Alternatively, in an active combat scenario with nuclear release authorised, then a sub could use a nuclear torpedo to wreck the CVBG. The subsequent white-out of the sonar picture and the chaos caused might enable the attacker to slip away.

HundertzehnGustav 01-09-13 02:19 PM

*game starts*
carrier group: hi, sup sub
sub: hi, nothing fatso.
Sub: *torps!*
Sub: 1CVE, yaa!
*CVE has left the game*
Carrier group: *Nukes!!*
*Sub has left the game*
Carrier group: Holy S! Holy ! HOLY S! what did i do!!
*Carrier group has left the game*
*Crowd laughing*


:up::D

Skybird 03-20-13 01:58 PM

German news Die Welt reports that after 18 days U32 has reached Mayport today via a plotted course 4600 nm long. It did the full trip under water.

Calculating 4600 nm and 18 days gives an average speed of 5.9 knots.

I'm sure military secrecy hides some reserve there.

What I read for the first time there is that the Germans seem to hope to sell the Americans into the non-nuclear submarine option, and have them buying the 212/214.

The boat left Germany on March 2nd, and is planned to head home in August. The crew will change in Florida.

Marcello 03-25-13 03:36 PM

Quote:

Originally Posted by Jimbuna (Post 1990333)
I'm confident the German submarine will perform extremely well but in real life hostilities I'd expect a submarine would give a good hint to its whereabouts when launching a weapon and as such the battle group would possibly go nuclear (especially if a carrier were hit) which would mean less accuracy would be needed in said retaliatory response.

Losing a diesel boat in exchange for a CVN would still be a huge success from a "big picture" point of view. That said while ASW nukes (nuclear tipped ASROC and so on) were done away with at the end of the Cold War I would not still want to be inside a SSK in such circumstances.

Quote:

German news Die Welt reports that after 18 days U32 has reached Mayport today via a plotted course 4600 nm long. It did the full trip under water.
Calculating 4600 nm and 18 days gives an average speed of 5.9 knots.
I'm sure military secrecy hides some reserve there.
It could almost certainly go faster but probably only at the price of exposing the snorkel and running the diesel more often or using up the specialized AIP fuel/oxydizer in transit.That is something you would think twice about if there is a well resourced, competent enemy looking for you. For what is worth that would have been the Type XXI underwater cruising speed too, give or take; I would not be surprised if the efficiency gains made possible by technological improvements (permanent magnets and so on) had to be used up to make room for the AIP, mass wise.


Quote:

What I read for the first time there is that the Germans seem to hope to sell the Americans into the non-nuclear submarine option, and have them buying the 212/214.
Not going to happen, unless the US does a strategic 180°.
Really, the diesel boat became handicapped when it was forced underwater at the end of WW2. By increasing underwater performance at the expense of surface capability it did regain some measure of mobility, but matching nuclear power or even just the old submersible running on the surface would not be possible. Therefore for a country focused on worldwide deployment it makes little sense to invest in SSKs.


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