KD Kedah (F171)

In the 1990s, the Royal Malaysian Navy identified the need to replace their ageing patrol boats. These 31 m long vessels built by Vosper Ltd with a displacement of 96 tons had been in service since the 1960s.[1] After receiving government approval, the Malaysian Navy ran a competition for the design in 1996, planning to purchase 27 vessels over 15 years. The specifications aimed for a design with a displacement of 1,300 tons and an overall length of 80 m. It was already noted at that time that this resembled full-fledged corvettes rather than patrol vessels, but the eventual winning bid would turn out to be even larger.[2] The Australian bid proposed a Joint Patrol Vessel, to be designed by Australian Transfield Shipbuilding and subsequently purchased by the Malaysian Navy as well as the Royal Australian Navy.[3] Other contenders were the German Naval Group consortium as well as British shipyards Vosper Thornycroft and Yarrow Shipbuilders.

The Kedah class is based on the MEKO 100 corvette. It is designed to have low radar detectability, low noise, low heat dissipation, and have an economical cruising speed. The main radar, TRS-3D/16-ES is a fully coherent multi-mode phased array C-band radar capable of fully automatic detection, track initiation, and classification of various types of targets. It is capable to track 400 air and surface targets with the detection range up to 200 km and the corresponding update times between 1 and 6 seconds.[4] An advanced control system known as Integrated Platform Management System (IPMS) is used to monitor and control the platform machinery of the ships, including propulsion, electrical, damage control, and auxiliary machinery and systems.[5][6]

Kedah was laid down on 13 November 2001 at Blohm+Voss, Hamburg and launched on 21 March 2003. In June 2006, after a total of 18 months of delays, the Royal Malaysian Navy commissioned KD Kedah.