OpinionWatch out: Singapore offshore and marine mega-contractor on the marchSimplified deal could see Sembcorp Marine acquire Keppel Offshore & Marine by end of yearAt the yard: an employee prepares to board Tullow Oil's floating production, storage and offloading vessel Prof. John Evans Atta Mills at Sembcorp Marine's Jurong Shipyard in Singapore.Photo: REUTERS/SCANPIXAmanda BattersbySingapore