Mexico Carmen del Playa, A Semi submersible oil work over platform (6 legs, 800 pax hotel and 2 x 250 ton crane) capsized while anchored near a production platform. The semi-sub was leaning against a leg of the jacket and rested in the seabed.
Salvage comprised of, stabilizing the situation with a puller barge. Refloat the semi- sub using compressed air and a lifting barge with 4800 ton lifting capacity. Cleaning the barge of environmentally dangerous substances and fuel. Tow the semi sub to 1200 m deep water and sink it in a controlled manner.