A slide rule? No way
Flying is definitely making me relearn skills I haven’t had to use in over 15 years. And, it is making me learn new ones, ones I’d never ever expected to seriously have to learn. Like, the slide rule. See the wikipedia’s entry on the E6-B flight “computer”. Whoda thunk?
I think the jury’s still out on what I’ll prefer to pack, but this device does seem to hold a morbid curiousity with me.