River Batch 1

The River class is a class of offshore patrol vessels built primarily for the Royal Navy of the United Kingdom. A total of nine were built for the Royal Navy (RN), four Batch 1 and five Batch 2. One Batch 1 (HMS Clyde), which was the Falklands guard ship, was decommissioned and transferred at the end of its lease to the Royal Bahrain Naval Force. The three remaining Batch 1 ships perform fisheries security and border patrol tasks in UK waters. The five new Batch 2 ships provide overseas forward presence, performing maritime security duties and disaster relief operations, on occasion supported by a Royal Fleet Auxiliary vessel. The Batch 1 ships of the class replaced the seven ships of the Island class and the two Castle-class patrol vessels. HTMS Krabi was the first of two ships adapting the River design for the Royal Thai Navy and built in Thailand.