Reward for lost Kraken!
Join Date: Apr 2006
Thanked 142 Times in 139 Posts
Rep Power: 11
The "EB6" calculator from any pilot shop. That's a mechanical calculator, i.e. paper or plastic wheels on a card, that can give you a fast graphic solution, no power or internet access needed.
If there were no instructions with it, you can find them online. Weems & Plath sell a gen-you-whine nautical version, but they work the same way.