Pisces is right. Nomographs are that simple.
Usually, though, I use either a whiz-wheel like this:
or a linear slide rule to do my calculations.
I do however have a maneuvering board that I printed out on cardstock, then laminated so that I could use dry erase markers on it, and it has a speed/time/distance nomograph on it. The only problem is that the scale is in yards, not meters! In any case, I very rarely use it anyway. It's very helpful for visualizing the situation, but it's a bit more work than just doing a quick procedure with a wheel or slide rule.