Russia’s first nuclear ballistic Borey class strategic submarine will be deployed with the Russian Navy in 2013 followed by the same-typed Alexander Nevsky Bulava-carrier in 2014. The Borey class submarines will replace the aging Project 941 and Project 667 class (Delta-3 and Delta-4) boats. Russia is planning to build eight Borey and Borey-A class subs by 2020. Two more Borey class submarines are under construction. A Borey class strategic submarine is 170 meters long, with a diameter of 13 meters (42 feet), a crew of 107, a maximum depth of 450 meters (about 1,500 feet) and a submerged speed of about 29 knots. The Yury Dolgoruky submarine was expected to join the Russian Navy by the end of 2012 but due to technical flaws during the sea trails it is expected to be carried out in 2013.