BNS Nirmul is a Durjoy-class semi-stealth large patrol craft (LPC) of the Bangladesh Navy.

The LPC is powered by triple SEMT Pielstick 12PA6 diesels driving three screws for a top speed of 28 knots (52 km/h; 32 mph).

The LPC is armed with a single 76.2 mm H/PJ-26 naval gun and four C-704 surface-to-surface missiles (SSM) mounted aft.

In addition, it has two dual Oerlikon 20 mm cannon mounted amidships which can be used in an anti-aircraft role.

[3] After completion of the UNIFIL deployment period, the ship visited the Port of Colombo from 7 to 9 February 2018 on her way back home.