Bangladesh Navy on Sunday started its journey as a “three-dimensional force” as two submarines were commissioned in its fleet for the first time.Prime Minister Sheikh Hasina officially commissioned the two submarines -“Nabajatra” and “Joyjatra”- made by China.Ministers, parliament members, the chiefs of three services, diplomats and high civil and military officials were present on the occasion.A ship brought Bangladesh’s first submarines to Chittagong Port from China on December 22.Earlier on November 14, Rear Admiral Liu Zizhu on behalf of the Chinese government handed over the submarines to Chief of Naval Staff Admiral Mohammad Nizamuddin Ahmed at a ceremony held at Liaonan shipyard in China.Both the submarines are 76 metres long, 7.6 metres wide and are equipped with torpedoes and mines which are capable of attacking enemy warships and submarines.