The third Kilo-class submarine Russia built for Vietnam arrived at Cam Ranh Bay in the south-central province of Khanh Hoa on Wednesday night.
The submarine, codenamed HQ184 Hai Phong, is being towed to Cam Ranh Port Thursday by cargo ship Rolldock Star.
This is the third of six Kilo-class diesel-electric submarines that Vietnam contracted to buy from Russia under a US$2-billion deal in 2009.
The first two subs, HQ-182 Hanoi and HQ-183 Ho Chi Minh City, arrived in Cam Ranh in January and March of 2014.
The fourth one, HQ-185 Da Nang, was launched in March 2014 and is testing the waters on the Baltic Sea. It is expected to be handed over to Vietnam in mid-2015.
The fifth one, HQ-186 Khanh Hoa was launched in December 2014 and is scheduled for a trial run this May.
The delivery of the last one, HQ-187 Ba Ria-Vung Tau, is scheduled for next year.
These submarines can operate at a maximum depth of 300 meters and a range of 6,000-7,500 nautical miles. They can patrol for 45 days and accommodate a crew of 52 submariners.