The animation below shows the BLAT being lowered through the Telescopic Joint, and then landing in Landing Dog Slots in the Upper Transition Joint. The Transition Joint is welded between the Telescopic Joint and the first Riser Section. When the BLAT has landed in the Transition Joint, the Drill Pipe is rotated Counter Clockwise, which causes the BLAT Load Supports to extend. Tension is then applied to the Drill Pipe, which raised the BLAT until its Load Supports land in the Upper Transition Joint's Load Support Slots. Applying more tension to the Drill Pipe raises the Telescopic Joint, Transition Joint, Riser Sections, and Blowout Preventer.
After the Blowout Preventer has been sucessfully landed, tension is relieved on the Drill Pipe, and the BLAT is lowered until the Landing Dogs once again land in the Upper Transition Joint's Landing Dog Slots. The Drill Pipe is then rotated Clockwise, which causes the Load Supports to retract. Once the Load Supports are fully retracted, the BLAT is then pulled through the Telescopic Joint, and retrieved.