>>2165303
Aha. Yes it's military and maybe returning from the recent RIMPAC exercises in Hawaii?
Boeing E-6 Mercury
The Boeing E-6 Mercury is an airborne command post and communications relay based on the Boeing 707-320. The original E-6A manufactured by Boeing's defense division entered service with the United States Navy in July 1989, replacing the EC-130Q. More at Wikipedia
RIMPAC, the Rim of the Pacific Exercise, is the world's largest international maritime warfare exercise. RIMPAC is held ly during June and July of even-numbered years from Honolulu, Hawaii. More at Wikipedia
And yes there could be several of them involved in this exercise.
R7