 "Puncher" has a permanent crew of five regular Royal Navy personnel, one officer and four ratings, who fulfil the minimum necessary seagoing complement of the vessel.The ship's company is also regularly boosted by up to 12 (more typically 10) URNU officer cadets and midshipmen who are normally accompanied by a Royal Naval Reserve training officer.Alternately the berths may be used by any other personnel who are required to live aboard.