flyingbear88:
Using outer scale over inner scale:
ETP Dist? GSR
TTL Dist. GSR+GSC
PSR (hrs)? GSR
TTL Fuel-RSV GSC+GSR
ETP: equa time point (time/distance using wind at ETP3/2 altitude)
GSR: ground speed return
GSC: ground speed continue
PSR: point of safe return (fuel)
With an offtrack ETP, always measure the ETP distance from the return airport.