Which model aircraft does the 1A3X1 specialty apply to?

The 1A3X1 specialty refers specifically to the aircrew positions that operate the RC-135 series aircraft, which includes the variants RC-135V, RC-135W, RC-135S, and RC-135U. These aircraft are used primarily for intelligence, surveillance, and reconnaissance missions, and they require specialized training for aircrew members who operate sophisticated onboard equipment and systems.

The RC-135 series is unique in its mission profile, which directly correlates to the skills and training required in the 1A3X1 specialty. This specialty encompasses various roles, including electronic warfare, intelligence gathering, and data interpretation, which are essential to the successful operation of these surveillance platforms.

Other aircraft listed, such as the MH-139A, EC-130/37, and C-130H/J, are not associated with the 1A3X1 specialty. They belong to different categories of aircraft, each requiring their own specific aircrew training and specialties. Therefore, the focus of the 1A3X1 specialty is unequivocally linked to the operational and technical requirements of the RC-135 series, solidifying its important role within the aircrew community.