This contract requires preventative maintenance twice per year on two specific COMET X-Ray units to ensure safety and proper function. The work must be performed by a contractor certified and authorized by the OEM, COMET Technologies USA, Inc., who must provide proof of certification. The required services include all necessary labor, travel, parts, and equipment to complete the maintenance. The equipment is used to support Trident submarine maintenance. Only personnel authorized by the OEM may perform this maintenance due to the high-risk nature of the equipment.