Donghae-class

Summary

Description

The Donghae-class Patrol Combat Corvette (PCC) was developed as part of the Republic of Korea Navy's 1st Yulgok Project (1974-1986) for the Republic of Korea Armed Forces with the aim of patrolling maritime borders and protecting littoral zones. Known for its low-cost efficiency, this vessel replaced various ex-US warships previously used by the Republic of Korea Navy, providing a numeric advantage to the newly developed Ulsan-class frigate.

The ship's design prioritized stability for sailing at patrol speeds (5-8 knots), featuring a U-shape hull which was favored over a V-shape design due to past negative experiences with fin stabilizers. The original propulsion system was to be a Combined Diesel and Diesel (CODAD) system for a maximum speed of 25 knots but was later altered to a Combined Diesel or Gas (CODOG) system to achieve a speed of 30 knots. General Electric LM2500 was chosen as the engine for its high power output. The ship also experienced issues during sea trials related to propeller singing which were later addressed.

The armament of the Donghae-class focuses primarily on surface combat to counter small North Korean ships. The armaments are controlled by a Signaal SEWACO ZK fire control system combined with Raytheon 1645 surface-search radar, Signaal WM28 fire-control radar, and Signaal LIOD optronic director. The ship is also equipped with anti-submarine weaponry including EDO 786 sonar and Mark 32 Surface Vessel Torpedo Tubes. However, due to budget constraints, the ship lacks air-search radar and anti-air weapons, leaving its defense against air and missile attacks limited.

A significant operational history event includes the 1998 Yeosu submersible incident, wherein the Donghae participated in an operation that sunk a North Korean semi-submarine.

Of the four Donghae-class corvettes, which were commissioned in the Republic of Korea Navy since 1983, decommissioning began in 2009 and the class is being replaced under the FFX program. As of 2021, the only remaining operational Donghae-class corvette is currently serving with the Colombian Navy. The Colombian Navy chose this class for its efficiency and durability in 2012 and began its service in their fleet in 2014. After refurbishment and upgrading its main armament, the ship operated in Colombian waters.

Technical specifications