Overall, the country plans on building 15 diesel-electric submarines and 6 nuclear powered vessels in an attempt to modernize its navy. As a follow-up to a 2008 defense cooperation agreement, the Brazilian Navy signed detailed contracts in late 2009 with the French naval manufacturer DCNS. These contracts included technology transfers and construction assistance for four Scorpene-class diesel-electric attack submarines, as well as one nuclear powered vessel. With the exception of the first boat, all submarines will be built entirely in Brazil at the newly constructed Itaguai shipyard. The first Scorpene-class vessel is expected to be completed by 2016 and to be commissioned in 2018, while the other three SSKs are scheduled for completion in 2022. The construction of the first SSN is planned to end in 2023 with entry into service slated for 2025.