Which form must accompany the vehicle when transporting ammunition over public roads?

The correct form that must accompany the vehicle when transporting ammunition over public roads is DA Form 2890. This form is specifically designed for hazardous materials and is essential for ensuring compliance with regulations pertaining to the transportation of dangerous goods, including ammunition.

DA Form 2890 serves to document the details of the hazardous materials being transported, such as quantity, type, and destination, as well as safety information needed in case of an incident during transport. Using this form reflects adherence to safety protocols and legal requirements for public road transport.

Other forms, such as DA Form 581 and DA Form 3151-R, serve different purposes within ammunition handling and inventory processes but are not specifically required for the transportation of ammunition over public roads. DA Form 581 is used for requisitioning ammunition and supplies, while DA Form 3151-R is used for turn-in and for inventory purposes. Therefore, the requirement for a transport-specific document makes DA Form 2890 the appropriate choice for this situation.