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Breaking the ice

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Breaking the ice

Postby redboat219 » Fri Oct 08, 2010 9:41 am

It's is widely known that the Sturgeon and LA class of boats have hardened sails and the ability to rotate their sail-mounted dive planes to a vertical position for breaking through the ice when surfacing in Arctic regions. My question is why?

I understand that if we were dealing with missile boat (during the cold war Russian boomers would hide from American HKs under the ice and when the order came would punch through and launch their missiles). But why an attack boat?
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Re: Breaking the ice

Postby greenman407 » Fri Oct 08, 2010 12:05 pm

Just to venture a guess( I do a lot of that) I would say that there is a need to breach the Ice in order to raise sail antennas to link up with satelites for comunications and ECM. Also in case of emergency they could vent the boat on the surface in case of fire or other problem and the men could actually get off the sub until rescued.
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Re: Breaking the ice

Postby wlambing » Fri Oct 08, 2010 1:16 pm

Gents,

Greenman got this one! Get him a cigar!! Oh, and a teddy bear!

Communications are the biggest reason, but all he's listed bear considerably. The capability is also very handy for evacuating injured and ill crew. That feature has been used a lot since we started to visit the great white north. Oh, only Sturgeons could rotate the planes. Early 688s could not and thus were restricited to ops in the Marginal Ice Zone. The Flight 3 688s regained the capability with the bow plane design.

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Re: Breaking the ice

Postby redboat219 » Sat Oct 09, 2010 2:09 am

the 688s have ringed props for underice ops. Did the sturgeons ever sport them?
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Re: Breaking the ice

Postby wlambing » Sat Oct 09, 2010 9:06 am

No.

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Re: Breaking the ice

Postby SubICman » Thu Oct 14, 2010 12:38 pm

A common misconception is that the early 688's could rotate their fairwater planes 90 degrees to surface through tthe ice. This isn not true, the 688's with fairwaters did not have hardened sails or 90 degree fairwaters, and were not capable to surface through the ice unless it was an emergency, then the max limit was less than 4 feet of ice, and they could do it one time. The ringed props on the Improved LA's was for more than ice ops also, would tell you about it, but then I would have to kill you :)
I was one half of the two person team trained to surface the boat through the Ice in an emergency when I was on the USS Augusta SSN-710. The Chief of the Watch (COW) and the Diving Officer of the Watch, I was the COW, but was trained as the DIve also, the whole show was pretty much the COW. Very interesting training, and many hours in the Dive and Drive simulator at sub school.


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When surfaced, the bridge access hatch can be optionally open or shut, however, when submerged it is required to be shut. (Really a no s***t precaution from a procedure in use in the sub fleet today.)
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Re: Breaking the ice

Postby SubICman » Thu Oct 14, 2010 12:40 pm

Missed your other post about the 88's Bill, didnt see that reply :)
When surfaced, the bridge access hatch can be optionally open or shut, however, when submerged it is required to be shut. (Really a no s***t precaution from a procedure in use in the sub fleet today.)
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Re: Breaking the ice

Postby redboat219 » Thu Oct 14, 2010 10:31 pm

SubICman wrote: The ringed props on the Improved LA's was for more than ice ops also, would tell you about it, but then I would have to kill you :)




My guess is that the ring prevents or lessen the vortices coming off the blade tips. :roll:
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