Which service support is NOT associated with military sealift?

The correct answer, atomic research experimentation, is not associated with military sealift because military sealift primarily focuses on the logistical support of forces, which includes the transportation of equipment, personnel, and supplies. This service is critical in ensuring that deployed forces are supplied and sustained in various operational environments.

In contrast, the other options like rescue and salvage operations, cable laying and repair, and submarine support, are all activities that can fall under the purview of military sealift services. These operations may involve the use of ships and other maritime resources to conduct specialized missions that directly support naval operations or contribute to overall military readiness at sea.

The focus on military sealift emphasizes logistical and operational support rather than scientific endeavors such as atomic research experimentation, which is more aligned with specialized research institutions or elements of the military that focus on research and development rather than operational support.