The document discusses two projects involving rigs undergoing maintenance work. For the Transocean Sedco 704, specialist teams used innovative tension netting systems to blast and paint ballast tanks, removing the need for scaffolding. They also refurbished and repainted the upper derrick. For the Transocean Sedco 712, scopes included a full derrick refurbishment and replacement of corroded components during a 200+ day yard stay. Access & Coatings found a solution to fully encapsulate the derrick from top to bottom without scaffolding. In both cases, David Hill was contracted to oversee health, safety, and environmental monitoring.