Gentlemen, The Russians don't know where ANY of our submarines are....
Since well before the days of the 688 class, our boomers have been off the coast of Russia. The Soviets understood that, and they still couldn't find them. Soviet subs visit Cuba on a regular basis, and have been plying the gulf for years. The Akula is a quiet boat (by Russian standards). Unless we are actually looking for them, it's not easy to detect them unless they make noise and they don't make noise normally. It's not difficult to hide. Moreover, the gulf is rather noisy. If tensions were higher, no Russian sub could leave port without a shadow.