Target, fire, and maintain weapons used to destroy enemy positions, aircraft, and vessels.

Operate tanks, light armor, and amphibious assault vehicles during combat situations on land or in aquatic environments.

Perform in-flight duties to ensure the successful completion of combat, reconnaissance, transport, and search and rescue missions.

Load and unload chemicals and bulk solids, such as coal, sand, and grain into or from tank cars, trucks, or ships using material moving equipment. They perform a variety of other tasks relating to shipment of products. They gauge or sample shipping tanks and test them for leaks.

Operate diesel or electric powered shuttle car in underground mine to transport materials from working face to mine cars or conveyor.

Collect and dump refuse or recyclable materials from containers into trucks. They drive trucks.

Operate power pumps and auxiliary equipment to produce flow of oil or gas from wells in oil field.

Tend, control, or operate power driven, stationary, or portable pumps and manifold systems to transfer gases, oil, other liquids, slurries, or powdered materials to and from various vessels and processes.

Operate steam, gas, electric motor, or internal combustion engine driven compressors. They transmit, compress, or recover gases, such as butane, nitrogen, hydrogen, and natural gas.

Feed materials into or remove materials from machines or equipment that is automatic or watched over by other workers.