In 1964, I got my PPL using a Dalton computer for the Nav. calculations. I let it lapse, but got it revalidated in 1987. I had bought a state-of-the-art Navigation computer - the "whizzwheel" - but hadn't used it for years.
I did the Nav. exam using a non-programmable scientific electronic calculator, and basic trigonometry, which I was current with. If you're familiar with that, ask about using it.