Glueball & 411A;
I understand what you're saying...but, one more crosscheck of serial waypoints using course & distance might just find a programming error. This technique is useful before entering the NATS, and ESPECIALLY when a change of waypoints is assigned enroute; not to crosscheck position, but to find programming errors. To check 4 or 5 waypoints takes less than 3 minutes. Maybe a certain Delta flight might have found this useful...
Now, back to my enroute Playboy (except with distaff F/O).