Yes, it got fitted with a 2 line read out GPS unit, that was good for b-rnav (above fl95). It's default display showed track made good, desired track, ground speed and eta. If you played with it and input some more values it could calculate the wind up there, but if atc asked for a wind check, by the time you had done it you would have landed or changed sector! At the time non of us had a manual for it so it was trial and error but it worked. SIDS etc were all old school needles and head scratching!