What document shows a service member's qualification as an equipment operator?

The document that shows a service member's qualification as an equipment operator is the DA Form 348. This form is specifically used to record and monitor the qualifications and certification of military personnel operating various types of equipment. It serves as an official record that details the individual’s training, experience, and proficiency in operating equipment safely and effectively. This document is crucial for ensuring that Army personnel meet the necessary standards and regulations for equipment operation, thereby promoting safety and operational readiness.

The other forms listed do not serve the same purpose. For instance, DA Form 5984-E is related to the issuance of weapons and ammunition, OF 346 is used for civilian operator's identification cards, and SF 86 pertains to security clearance applications, none of which indicate qualifications for equipment operation.