Sound on 19 May. A rendezvous was made on 25 May 1982 with the requisitioned P&O liner, the troopship , and in order to transfer casualties by the ship's Westland Wasp helicopter. The day after she arrived in "Red Cross Box 2" – at position on 30 May, she embarked 49 casualties from Uganda. Underway the next day, 2 June 1982, on passage for Montevideo, she undertook the ship's first-ever replenishment at sea – a RAS(L) – with the oiler , in order to take on fuel. The ship arrived in the River Plate on 6 June, disembarking her patients in the full glare of the world's media, eager for news and photographs. She sailed south at 2200 the same day. The pattern of casualty evacuation was thus established: HMS Hydra worked with her two sister ships, HMS Hecla (see ) and HMS Herald, to take casualties from the main hospital ship Uganda (see ), operating in the declared "Red Cross Box", to Montevideo, Uruguay (see ), where they were disembarked by a fleet of Uruguayan ambulances and flown by RAF VC10 aircraft to the UK for transfer to the Princess Alexandra Hospital at RAF Wroughton, near Swindon. The hospital ship HMS Hydra made four such passages from the waters off the Falkland Islands to Montevideo, carrying a total of 251 British military casualties, many of them burns victims after the air attacks on landing ships at Bluff Cove (see ). The last three 'lifts' of patients were made with departures from Grantham Sound, in the Falkland Islands, to Montevideo on 14 June with 80 casualties, 24 June with 66 casualties and, finally, on 7 July 1982 with 48 casualties. Thirty of the ship's company had been trained, during the passage south, to support the medical staff as temporary nurses and many were called on for that assistance. Inspections to ensure compliance with International Committee of the Red Cross (ICRC) conditions were carried out by ICRC staff, some transferring to the ship in an Argentine hospital ship aircraft on 12 June. An inspection was also made by Argentine naval officers in the estuary of the River Plate. After the surrender, to Royal Marines Major-General Jeremy Moore, of the Argentine occupying forces on 14 June 1982, HMS Hydra stayed behind as the Falkland Islands Hospital Ship, based in Stanley (see ), until the airport runway was repaired and extended. After her