The Army MOS 12U, or Military Occupational Specialty, is a topographic analyst. Topographic analysts analyze military geographic information to create tactical decision aids. They also predict how terrain and weather will affect command, control, communication, computer, and intelligence systems.
Topographic analysts also:
Supervise lower-grade soldiers
Provide technical guidance to soldiers
Supervise topographic analysis activities
Coordinate and validate collection requirements
Manage databases for storing aerial photographs, maps, and other materials
Perform quality assurance during topographic operations
You can buy a US Army MOS 12U Topographic Analyst decal from Military Best, ArmyDecals, and Prior Service.