BNS Osman was a modified Type 053H frigate of the Bangladesh Navy, bought in 1988 from China.

Powered by two 8,000 horsepower (6,000 kW) type 12 E 390V diesel engines that drive two propellers, Osman had a maximum speed of 26 knots (48 km/h; 30 mph).

The Type 053H1 Frigate Osman was previously known as Xiangtan, which served with People's Liberation Army Navy (PLAN) in South Sea Fleet.

She was the first frigate of Bangladesh Navy who test fired C-802A missile in Bay of Bengal on 12 May 2008, which successfully hit the target.

[3] The ship had gone through major upgrades which included replacement of propulsion system, new missile launching platforms and an addition of a combat data link.

[5] On 11 October 2014, Osman was awarded the title of National Standard in recognition of the ship's quarter century of outstanding service in the Bangladesh Navy at home and abroad.