Everything in the B-52H is nuclear-hardened. Navigators don't actually use the slide rule or start sextant on a regular basis though they do train on it. This

Everything in the B-52H is nuclear-hardened. Navigators don't actually use the slide rule or start sextant on a regular basis though they do train on it. This article sounds like a PR effort by the USAF to help cost justify replacement of the B-52H.