USMC

As members of an M1A1 tank crew or unit, M1A1 tank crewman perform various duties incident to the operation and maintenance of the tank, to include tactical employment, firing and maneuvering. Typical duties include preparing tanks, personnel, and equipment for movement and combat; preparation of ammunition for firing; locating targets; loading, aiming and firing of organic tank weapons using the tank fire control system; driving the tank; and performance of operator-level preventive and corrective maintenance.

As members of an AAV crew or unit, AAV crewmen perform various duties incident to the operation and maintenance of assault
amphibious vehicles and the up-gunned weapons station (UGWS) MK19 40 MM/50 CAL M2. AAV crewman prepares AAVs for the tactical employment of troops and equipment during ship to shore movement and subsequent operations ashore.

Expeditionary fighting vehicle crewman perform various duties incident to the operation and maintenance of the vehicle, to include tactical employment, precision gunnery using the MK 46 Weapon system, and maneuver. EFV crewmen employ their vehicle during ship to objective maneuver and during subsequent operations ashore. Typical duties may include preparing the EFV and associated equipment for movement and combat, locating and engaging targets, driving the EFV in the water and ashore, and performance of first echelon preventive and corrective maintenance.