real life question about the Virginias and Seawolfs

GrayFox · 10-06-06, 05:24 PM

I have read somewhere that the Seawolf class SSN is quieter than the Virginia class.

I was wondering if it was true or not.

And if it is quieter do you think the budget cut on the new SSN class responsible for the virginia not being quieter?

Henson · 10-06-06, 09:41 PM

You'll never know.

SeaQueen · 10-06-06, 10:50 PM

Quote:

Originally Posted by Henson

You'll never know.

I was wondering how long it'd take someone to say something like that.

Henson · 10-07-06, 09:18 AM

For future reference, inquiries like that are viewed with suspicion, even in friendly forums like this one. Sometimes it's better to wonder at the truth than to get an answer over the open internet.

The reality? I don't know either. I haven't had any reason to know yet. The kernel of logic that resides in my soul, however, suspects that sound silencing technology has probably advanced substantially in the last decade.

The answer to that question is always more complicated than not, because it also includes variables such as operating lineups and speed. I'm willing to bet that a 688 at AA1 is quieter than a Collins at flank.

ASWnut101 · 10-07-06, 10:08 AM

I remember watching a show about this subject and it said that the Virginia would be quieter when running very slow, but the Seawolf would still have a higher Tactical Speed.....

SeaQueen · 10-07-06, 10:08 AM

Quote:

Originally Posted by Henson

Sometimes it's better to wonder at the truth than to get an answer over the open internet.

I always think it's more fun to watch people try to answer them and debate it. They're often wrong, but it's always fun to see the way these things are arrived at.

Quote:

The answer to that question is always more complicated than not, because it also includes variables such as operating lineups and speed. I'm willing to bet that a 688 at AA1 is quieter than a Collins at flank.

It also depends on the frequency of the sounds and the environment in which the submarine is operating. One submarine might have a higher SL at one particular frequency but if that one is lower than the cutoff frequency of the duct in which the two submarines we're comparing are in, then the one's noise might just get soaked up into the ocean, while the other suffers minimal transmission loss for tens of miles.

Sometimes I think people don't always understand the nuances of what they're really asking. Comparing sonar performance can be like comparing fine wines...

Henson · 10-08-06, 11:23 AM

Quote:

Originally Posted by SeaQueen

Comparing sonar performance can be like comparing fine wines...

Great image. It's an apt comparison. Usually the people doing the comparing (be it wine or sonar) have no idea what they're talking about.

I prefer to tell you up front: I don't know. Sonar is not my thing, and sound transmission is not my area of expertise or interest. What I am interested in is relative motion and the tactical application of all of the science behind sonar (ie what is my torpedo going to acquire and why).

SeaQueen · 10-08-06, 11:53 AM

Quote:

Originally Posted by Henson

I prefer to tell you up front: I don't know. Sonar is not my thing, and sound transmission is not my area of expertise or interest. What I am interested in is relative motion and the tactical application of all of the science behind sonar (ie what is my torpedo going to acquire and why).

I think it's all fascinating. It's like... ASW is a science of reasoning in the face of uncertainty. It's slow... it's intellectual... it's mathematically intensive...

I wish I could have been involved in things during the Cold War. Some of the old analysts at work have some great stories. It seems like there's nothing so grand going on in the ocean these days, not like it was.

Kapitan · 10-08-06, 02:22 PM

Seawolf is the expencive unit, the virginia isnt id say yes the sea wolf is quieter, i think you just got to be patient btw have you got a spare 50 years to wait to find the answer?

Henson · 10-08-06, 05:59 PM

No, Virginia is expensive as hell.

You want the truth? Seawolf class submarines (BSY-2) are updating to Virginia (BYG-1/BQQ-10 ARCI TI-04) fire control and sonar processing. Figure it out.

Dr.Sid · 10-09-06, 02:54 AM

What I heard is that Virginia was supposed to be cheaper, but it finished on like 80-90% of the price of SW. On the other hand, it is modular, easy to upgrade, has some revolutional concepts (like non-penetrating masts). It has everything to stay in service for a long time.

Kapitan · 10-09-06, 07:44 AM

And it best be worth every penny too !

SeaQueen · 10-09-06, 07:57 AM

Quote:

Originally Posted by Dr.Sid

What I heard is that Virginia was supposed to be cheaper, but it finished on like 80-90% of the price of SW. On the other hand, it is modular, easy to upgrade, has some revolutional concepts (like non-penetrating masts). It has everything to stay in service for a long time.

Part of what makes submarines so expensive these days is that the force requirements are so low, so only low production rates are required to meet the force level requirements. Low rate production is always more expensive per unit than cracking out a bazillion of submarines, but that's not what the Navy needs.

I think the real loser program in the defense budget right now is the F-22. I know the Airforce is willing to sell it's soul to build the thing, but it's SO expensive. Compared to the JSF (which isn't cheap at all), it isn't clear at all that they'll be able to really justify it. I think the Airforce is going to be the big loser in all future defense budgets until someone manages to kill that program.

SUBMAN1 · 10-09-06, 03:50 PM

Quote:

Originally Posted by Henson

No, Virginia is expensive as hell.

You want the truth? Seawolf class submarines (BSY-2) are updating to Virginia (BYG-1/BQQ-10 ARCI TI-04) fire control and sonar processing. Figure it out.

To build a Seawolf is 3 times the cost of a Virginia (The very reason it was cancelled in favor of building the cheaper Virginia), so figure it out. :p Never quite understood how the Seawolf project was cancelled due to cost before building the first boat, yet the Navy still produced 3 boats that aren't supposed to be funded for.

Doesn't surprise me that the Navy is updating its best boat to the latest Sonar though. Sonar has probably advanced significantly in the last 10 years. Seawolf is modular and this shows that, but Virginia has it beat in that area.

-S

Dr.Sid · 10-09-06, 04:31 PM

3 times ? That's pretty different of what I hear. Anybody knows ?

10-06-06, 05:24 PM	#1
GrayFox Mate Join Date: Mar 2006 Posts: 52 Downloads: 0 Uploads: 0	real life question about the Virginias and Seawolfs I have read somewhere that the Seawolf class SSN is quieter than the Virginia class. I was wondering if it was true or not. And if it is quieter do you think the budget cut on the new SSN class responsible for the virginia not being quieter? __________________ Typhoon Flotilla #6 Captain First Rank CO TK-210 "Ghost"

10-07-06, 10:08 AM	#5
ASWnut101 Admiral Join Date: Sep 2006 Location: USA Posts: 2,021 Downloads: 9 Uploads: 0	I remember watching a show about this subject and it said that the Virginia would be quieter when running very slow, but the Seawolf would still have a higher Tactical Speed..... __________________

10-08-06, 02:22 PM	#9
Kapitan Sub Test Pilot Join Date: Mar 2005 Location: UK + Canada Posts: 7,130 Downloads: 77 Uploads: 7	Seawolf is the expencive unit, the virginia isnt id say yes the sea wolf is quieter, i think you just got to be patient btw have you got a spare 50 years to wait to find the answer? __________________ DONT FORGET if you like a post to nominate it by using the blue diamond Find out about Museum Ships here: https://www.museumships.us/ Flickr for all my pictures: https://www.flickr.com/photos/131313936@N03/ Navy general board articles: https://www.navygeneralboard.com/author/aegis/

10-09-06, 07:44 AM	#12
Kapitan Sub Test Pilot Join Date: Mar 2005 Location: UK + Canada Posts: 7,130 Downloads: 77 Uploads: 7	And it best be worth every penny too ! __________________ DONT FORGET if you like a post to nominate it by using the blue diamond Find out about Museum Ships here: https://www.museumships.us/ Flickr for all my pictures: https://www.flickr.com/photos/131313936@N03/ Navy general board articles: https://www.navygeneralboard.com/author/aegis/

10-06-06, 09:41 PM	#2
Henson Planesman Join Date: Feb 2006 Posts: 185 Downloads: 13 Uploads: 0	You'll never know.

10-07-06, 09:18 AM	#4
Henson Planesman Join Date: Feb 2006 Posts: 185 Downloads: 13 Uploads: 0	For future reference, inquiries like that are viewed with suspicion, even in friendly forums like this one. Sometimes it's better to wonder at the truth than to get an answer over the open internet. The reality? I don't know either. I haven't had any reason to know yet. The kernel of logic that resides in my soul, however, suspects that sound silencing technology has probably advanced substantially in the last decade. The answer to that question is always more complicated than not, because it also includes variables such as operating lineups and speed. I'm willing to bet that a 688 at AA1 is quieter than a Collins at flank.

10-08-06, 05:59 PM	#10
Henson Planesman Join Date: Feb 2006 Posts: 185 Downloads: 13 Uploads: 0	No, Virginia is expensive as hell. You want the truth? Seawolf class submarines (BSY-2) are updating to Virginia (BYG-1/BQQ-10 ARCI TI-04) fire control and sonar processing. Figure it out.

10-09-06, 02:54 AM	#11
Dr.Sid The Old Man Join Date: May 2005 Location: Czech Republic Posts: 1,458 Downloads: 6 Uploads: 0	What I heard is that Virginia was supposed to be cheaper, but it finished on like 80-90% of the price of SW. On the other hand, it is modular, easy to upgrade, has some revolutional concepts (like non-penetrating masts). It has everything to stay in service for a long time.

10-09-06, 04:31 PM	#15
Dr.Sid The Old Man Join Date: May 2005 Location: Czech Republic Posts: 1,458 Downloads: 6 Uploads: 0	3 times ? That's pretty different of what I hear. Anybody knows ?