Yeah , I have lots of landmark point to point chart reading right seat time . I spent a fair amount of my teens there . Dad towards the end of his flying , driven by life more than anything else , he had a really nice 250 Comanche with a whole bunch of 260 airframe gap seals etc . Dual 720 King Nav Com , dual OMNI heads , basic IFR panel , zero Time prop , 300 SMOH engine ....... Cream de la cream or as good as it gets from a salvage bid with a few upgrades . 89-90 ? Anyway he had spent for the LORAN C .......the name escapes me but I'd know the logo if I saw it , we were coming back from Cedarville CA to Fallon . We crossed a ridge and had already made the 10,2 let down adjustments to burn off the 6000 ft in 140-160 miles . I leaned back to stretch , or maybe I was just checking my math against the gizmo . 180 , 220 , 350 , 610 ,675 , 710 knots ...... I nudged Dad saying something like " that's one heck of a tail wind " ......... I don't think except for one other time did I see him penticheck everything in the cluster including backing 3 turns off the throttle in under a second ...... Just the gigantic iron pile we were over . The DG never moved but the compass would wander about 10° and come back . Lots of dead reckoning back then still . Is that even legal now ? (Smirk)