The Tun Fatimah class is a series of offshore patrol vessels (OPVs) built by the Malaysian company THHE-Destini with the assistance of Damen company from the Netherlands based on the design of the Damen 1800-class OPV vessel. THHE-Destini is a joint venture between two local companies, which are THHE and the builder, Destini Berhad. The class is also known as the Damen 1800-class offshore patrol vessel and the class changed names after the first ship of the class, KM Tun Fatimah. A total of three ships of this class are planned to be built. Due to delays in the project, the Malaysian government has appointed a new builder, Shin Yang, to complete the remaining ships.
The Damen 1800 OPV contract was awarded to THHE-Destini local company in early 2017. The ship contract is worth RM738.9 million and the construction started in December 2017. The first ship will be completed in mid-2020. The OPV class has a length of , a beam of , and a draught of . She has a displacement of 1,890 tonnes and a speed of . The main armament of the ship are one 1 ÃÂ 30 mm Aselsan SMASH RWS and light defensive weapons such as 12.7 mm and 7.62 mm machine guns. She also has a complement of 46 crew. To fulfill the patrol duty, she also able to operate one medium-sized helicopter and one unmanned aerial vehicle. All ships will be named after female warriors of Malaysia.