An innovative rig repowering collaborative between Wartsila NSD and Houston Ship Repair, Inc. was recently completed in the U.S. Gulf, involving the installation of new gensets on Semisubmersible Drilling Rig Transocean Amirante of Transocean Sedco Forex. The upgraded Semi, now installed with more than 8.0 generation capacity, was conceptualized in late 1998. The work required extreme flexibility in scheduling, and included the possibility of a quay side or offshore installation. The project commenced with the carrying-out of a joint on-board survey, and was followed by meetings with Transocean, Wartsila NSD and HSR to specify responsibilities and detailed planning for a successful project.