In 2004, in order to meet CBO's aggressive fleet renewal strategy and to assure the construction of the new vessels in the necessary deadlines and of the company’s quality standards, CBO acquired EBIN Shipyard which was renamed to Aliança Shipyard. CBO invested in its industry to be able to meet these deadlines and standards. 

Aliança Shipyard is strategically located in an area of 54,000 m² on BR-101 road in Niterói, alongside Baía de Guanabara. Today the shipyard is building four PSVs – Platform Supply Vessels for CBO, with delivery planned up to 2009.