Which document is crucial to have for operating military vehicles?

The crucial document for operating military vehicles is DA Form 5984, also known as the "Military Vehicle Operator's Permit." This form is essential because it certifies that a service member is authorized and trained to operate specific military vehicles. It ensures that the operator has met the necessary training standards and understands the operational requirements associated with the vehicle. This permits accountability and safety within military operations, as only trained personnel are allowed to drive these specialized vehicles.

On the other hand, the other mentioned documents—like vehicle registration, insurance cards, and service records—while important in their respective contexts, do not specifically address the qualifications or permissions necessary for operating military vehicles. Vehicle registration and insurance are more relevant to civilian driving and regulation compliance, while service records are focused on tracking a service member's military career and achievements rather than their vehicle operation authorization.