Keeping the blogosphere posted on the goings on of the world of submarines since late 2004... and mocking and belittling general foolishness wherever it may be found. Idaho's first and foremost submarine blog. (If you don't like something on this blog, please E-mail me; don't call me at home.)

Tuesday, April 18, 2006

Submarine Vets Tour HMS Gotland

A reader with a Scandinavian ISP sent a couple links today with some interesting news about HMS Gotland, the Swedish sub currently providing a training "target" (if they can find her) for the Pacific Fleet out of San Diego. The first is a report from a Swedish paper that everyone seems to be very happy with the experience to date, and are looking to see if they can extend the Gotland's stay for another year.

The second link was fascinating to me. A group of WWII submarine veterans (from the Ventura chapter of USSVWWII) were given a tour on Gotland when she was in port earlier this year, and got a lot of great pictures, including some pictures of the inside of the sub. Definitely worth a visit to the website.


Anonymous Anonymous said...

Great pics and tour article. Thanks for posting this.

4/19/2006 10:08 AM

Blogger Zoe Brain said...

Those pictures of the CSU-90 consoles brought back some interesting memories.

Team leading the mixed bag of Israelis, Germans and Australians doing the Inter-processor communications.. or getting my hands dirty with the yummy Audio code.

Same system's on the SAS Manthatesi, which you blogged about before. I think that one has the full ISUS-90 integrated system. The Swedes had to buy the Swedish CS, obviously, and it's quite adequate (that's high praise from me), even if it does make the maintenance logistics a little harder.

Seriously,that sonar suite is a very capable piece of kit, even if I do say so myself.

4/19/2006 9:10 PM

Blogger Bubblehead said...

I assume that diesel boats don't worry about towed arrays, and can concentrate all their sonar processing in the bow or hull arrays. Is that true, Zoe?

4/19/2006 10:47 PM

Blogger Zoe Brain said...

Oh Donks love using towed arrays, to the umpteenth CZ.

In fact, they pretty much have to. Being a Donk means you need more warning, and TMA (even rough TMA to get an MLA) so you can get to the immediate area with minimum indiscretion.

Our O-boats used clip-on arrays back in the early 80's, and used old FAS processors to massage the data and beamform.

But I can't go into solving the ambiguity problems etc on an open forum, can I?

BTW what the site labels an active transducer looks suspiciously like part of a Passive Intercept array, used to detect and by wavefront curvature timing get a solution on active sonars nearby. Which is the best way of detecting a Donk being sneaky.

4/20/2006 4:58 AM

Blogger Zoe Brain said...

Oh one more thing - the CSU-90 has all processor cards plug'n'play identical. Remember, hotel load is a big deal for donks, can't just burn a few exra neutrons to power special-purpose CAS-only, FAS-only or TAS-only processors. You switch resources as required, adapt beam-form on sectors of interest etc.

Of course, the software for this is non-trivial :)

I'm fully in favour of the Gottland playing target with the USN, and hope there are a lot of Sub vs Sub encounters. I think there may be some surprises.

4/20/2006 5:29 AM

Anonymous Anonymous said...

regarding towed arrays on Swedish boats, my source, a Swedish Lt. told me they don't use them because the Baltic is to shallow.

What I've heard to date (7/12/06) from my sources at Ballast point is USN ASW having a lot of trouble finding Gotland. City boats have to go "active" (just turn on that big pinger boys and we know where you are!!) USN gets another year of services from Gotland and gotta step up their game to play with them.

Keep a zero bubble......

7/13/2006 5:26 PM

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