A 12 hour on station endurance, is essential.
At what range from base, Stuffy?
If your base is in Sig, you don't need 1200 NM to get much of anywhere, for example. If your range to datum decreases, then on station time increases.
The Pacific mission is another matter, which I suspect informs the Air to Air refueling option.
keesje, "believe me" is a reach, sorry.