Russian submarine Alexander Nevsky (K-550)
 Russian submarine K-550 Alexander Nevsky is a Russian nuclear ballistic missile submarine of the fourth generation Borei class (Project 955A). Named after the Russian saint Alexander Nevsky the submarine was laid down in March 2004 and was first planned to be launched in 2009. However budgetary problems and repeated failures of the submarines main weapon the Bulava SLBM missile pushed the launch date forward.