USS Annapolis In The Arctic
Because it's winter, here's a very cool picture of USS Annapolis (SSN 760) surfaced through the ice back in March 2009:
What's the coldest you've ever been on a submarine? For me, it was a surface transit through the Straits of Juan de Fuca and down the Washington coast (because an incoming SSBN had all the submerged water in the area) in December 1991. I went through 3 lookouts on that watch. I was The Man.