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58/588 under ice

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TomStrasser View Drop Down
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    Posted: 21 Dec 2018 at 4:41pm
Did the Skipjack class have at one time under ice capabilities and did they ever do any under ice exercises.

I know we had the BQN 4 and think we had a switch to select several transducers, but those extra transducers were remove (if they ever existed)
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dave595 Quote  Post ReplyReply Direct Link To This Post Posted: 21 Dec 2018 at 5:31pm
On the 595 we were told we could not go "way" under the ice because we had one screw.  This was in the late 60's.  I suspect the Skipjack had the same restrictions at the time.  This must have changed later because later single screw boats sure did.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote SaltiDawg Quote  Post ReplyReply Direct Link To This Post Posted: 21 Dec 2018 at 7:10pm
There were actually numerous Diesel Boats that made forays under the ice without benefit of an under ice sonar.

I forget which boats, but Nautilus made at least two trips up to the Ice Edge in the Atlantic in company of diesel boats prior to their trans polar trip to counter Sputnik!  IIRC correctly, the Diesels got maybe 30 miles from the ice edge, the Nautilus a hundred plus.

EDIT:  As an example, in the Fall of 1957 Nautilus and Trigger went up to the Atlantic Ice Edge and each conducted forays under the ice. 


Edited by SaltiDawg - 22 Dec 2018 at 9:56am
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Flapper Quote  Post ReplyReply Direct Link To This Post Posted: 21 Dec 2018 at 7:29pm
As I recall, for Skipjack boats there was no ability to put the sail planes in a vertical 90 rise position, as the Sturgeon and LA boats could. Additionally, I doubt the sail and snorkle 'turtleback' fairing were strengthened enough for surfacing through anything more than a few inches of sea ice.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote SaltiDawg Quote  Post ReplyReply Direct Link To This Post Posted: 21 Dec 2018 at 8:31pm
The last eight LA Class had Bow Planes.  IIRC, the earlier LA Class with Fairwater Planes did not have an Under-Ice position, as the 637s did.  The Skipjack class dd not have an Under ice position.

Those Diesel Boats and Nautilus, etc, did not usually if ever surface thru the ice.


Edited by SaltiDawg - 21 Dec 2018 at 8:32pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote sailor777 Quote  Post ReplyReply Direct Link To This Post Posted: 22 Dec 2018 at 7:04am
on the 688 we had under ice sonar (never used it), but the sail planes could not turn 90 degrees.  neither was the sail cap reinforced.
 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote fortyrod Quote  Post ReplyReply Direct Link To This Post Posted: 22 Dec 2018 at 5:06pm
Originally posted by SaltiDawg SaltiDawg wrote:

There were actually numerous Diesel Boats that made forays under the ice without benefit of an under ice sonar.


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Post Options Post Options   Thanks (0) Thanks(0)   Quote SaltiDawg Quote  Post ReplyReply Direct Link To This Post Posted: 22 Dec 2018 at 5:57pm
The forerunner of Sennet's Under ice Sonar was originally developed during WWII as a Mine Detection and Avoidance ahead looking FM sonar.  Admiral Lockwood met Dr. Waldo Lyon in San Diego early on in the War - shortly after taking over as COMSUBPAC.  Lockwood became a huge supporter and recognized the possible implications of this FM ahead looking Sonar with it's "Hells Bells" audio and visual alerts for mines and other obstacles.

Lookwood obtained the funding and later forced the initial installations on some Fleet Boats.  This enable him to Send three groups of three boats all equipped with this Sonar into the Sea of Japan in mid-1945. This Op was under the auspices of Commander Barnie Siegliff - Operation Barnie.

It is suggested that Lockwood was driven by trying to get revenge for Mush Morton and Wahoo's loss, believed sunk by a mine. 
He later was criticized when Bonefish was lost, but it clearly showed the potential of this system.

In 1946 Dr. Lyon ended up pushing the value of the FM Sonar as an Arctic asset and the NEL (Naval Electronics Lab) and subsequently the Arctic Submarine Lab.

Interesting ly, the FM Frequency range used in 1944-45 remained in use until at least the 1970s.  An uplooking and down looking capability was added to the Mine Sonar to get the Arctic Suite.

Dr Lyon retired in the mid 1990s after like 55 years - I considered him a friend and remained in contact for many, many years.  He and Dick Boyle!





Edited by SaltiDawg - 01 Jan 2019 at 8:25pm
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