The NC-37B is the future US Navy C.A.E.W. (Conformal Airborne Early Warning). Built off of the Gulfstream 550 (C-37B), it is similar to the Israeli G550 CAEW, the NC-37B features an interesting livery. The aircraft would be used primarily for detecting incoming missiles.

You can check out this and some of my other builds on the Military Builders server, at my plot world. Do NOT use this build without crediting me, and do NOT claim this as your own.