The 9th Mine Countermeasures Squadron is a front-line squadron of the Royal Navy with responsibility for mine warfare in the Persian Gulf region. The squadron is based in Bahrain and, as of 2023, is equipped with three mine countermeasure vessels and a Royal Fleet Auxiliary support ship.
In its original guise, the 9th Mine Sweeping Squadron (MSS) was formed of four Ton-class sweepers – HM Ships Appleton, Kemerton, Flockton and Chilcompton which were specially fitted for the rigours of operating in the Persian Gulf. The ships had their pennant numbers painted in Arabic on the stern and carried a funnel badge featuring a dhow on a yellow background.[1]
RFA Cardigan BayBritish RNMB Harrier, autonomous MCM vessel deployed to 9 MCM Squadron for trials in early 2023
With the planned retirement of all the remaining Sandown-class vessels by 2025, and their replacement with both autonomous minehunting systems and specialised "motherships" drawn from the Royal Fleet Auxiliary, at minimum a new configuration of the squadron was likely.[5] In February 2023, the autonomous minehunting vessel RNMB Harrier arrived in Bahrain to begin trials of autonomous systems in hot weather. The autonomous vessel will operate from RFA Cardigan Bay.[6][7]