Air Force designation for Refueler (modified mission)
C is the Air Force designation for Cargo (primary mission)
135 is the aircraft model
Miscellaneous » Aircraft & Aviation
Governmental » Military
KBYH - KBYP - KBYS - KBZ - KC - KCA - KCAE - kcal - KCAR - KCAS
"KC-135." Abbreviations.com. STANDS4 LLC, 2017. Web. 26 Jul 2017. <http://www.abbreviations.com/KC-135>.