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Image  KB  9/23/2015

The Centaur second stage, integrated with several structural elements, is transported from the Delta Operations Center or DOC and mated to the Atlas V booster in the Vertical Integration Facility or VIF. This process, known as Off-site Vertical Integration or OVI, significantly reduces the number of lifting operations performed at the VIF allowing for reduced time between launches. Relocating these operations to the DOC, an indoor facility, also mitigates the risk of weather-related processing delays.