I have a bullseye map with Joker/Bingo range rings for the F6F
Joker (for this map) is defined as fuel in gallons to fight 10 minutes at full throttle and then fly home at FULL throttle (10,000 feet)
I may alter the definition slightly for the next frame.
Bingo is fuel to fly home at 75% throttle at 10,000 WITH NO RESERVE
Obviously the fighters can stay longer than the Joker amount but fuel is critical at the Bingo amount. A trip around the CV takes about 2 gallons
Here is a screen shot of the map
The brown rings are 10 miles apart centered on the 6 line on the map edge. The white numbers are Joker/Bingo.
This information is very helpful in making snap decisions on fuel status.
I will post a link to the dds file itself after orders are posted and I make the final version for this frame.