BTW, just one gripe for Ivan and RA- Sturgeon (637 class) subs WERE under-ice and through-the-ice capable.
While they had fair water planes, they could pivot the planes 90 degrees up to punch through the ice cap. The 637's were the mainstay of USN operations in the arctic until the 688i's (688 flight 3) came along.
Just sayin'.. Otherwise, carry on.
