We just finished international ops in class, and believe it or not, with three fully capable INS units, supported by two FMS units and four GPS units including an extra stand-alone approach approved GPS, with RNP .1 capability, we STILL plot the course using a pencil, plotting chart, a manual E6B computer, and a plotter. And yes, accurate time measurements. Imagine a room full of professional pilots flying some fairly sophisticated, well-equipped aircraft, hunched over tables with manual plotters and computers in hand, and that was us. Those same things get used on long oceanic routes, too. Especially on long routes where precise navigation is necessary, to support, verify, and check our position constantly.
We do NOT depend soley on multiple long range nav guidance; we do it just like you...dead reckoning, pilotage, and stopwatch and compass is just as important in a B747 as in a Piper Cherokee...and when I'm flying a light airplane, I do it with map, plotter, and E6B in hand.
As for the "tracks crawling," what does that mean?