Resistance reduction and stealth performance in surface combatant warship(trimaran) have nowadays became an important issue to be investigated. Talking about trimaran ship resistance reduction, is to provide an understanding on the ship energy consumption in regard to its efficiency that is related to a considered reduction of the ship dragging, and wave making resistance. Additionally, stealth technology also known as low-observable technology (LO technology) has at present time acquired an integration into many categories and classes of high speed warships particularly trimarans that exist in this new era. The reduction of the Defense Frigate Trimaran2 (DFT2) radar cross section (RCS) is primarily an effort that DFT2 design will consider to improve survivability in opposition (against) to anti-ship cruise missiles (ASCHs), and radar homing. Stealth technology known as subdiscipline of the tactics utilized by militaries as well as passive and active electronic countermeasures, from which a range of methods being covered are utilized on ships, submarines, missiles, people, and so on to decrease detections (that is, being invisible) to radar, infrared, sonar as well as other detection methods. On the other hand, fiber, coating, polymer additives, special roughness, and surfactants when applied on the ship's surface hull, can have and ability of reducing drag in fluid flow. The main aim of this paper is to provide an understanding on DFT2 concepts methods (Concept Operation, Concept Exploration, and concept Development), resistance reduction (wave making reduction) and stealth performance (Radar-absorbent, Radar stealth countermeasures and limits) of DFT2 for the Union of Comoros. This research will provide an exploration of the capabilities and abilities that are considered as actual efforts for use of stealth in surface combatant vessels as well as providing an insight on how reduced RCS might carry out tremendous varieties of warfare missions. The importance of this paper is focused on the resistance reduction and stealth performance as the requirement process of DFT2 design concept methods.

Keywords : Trimaran, Ship Concept Model, Resistance Reduction And Wave Making Resistance, And Stealth Performance