She was North East of East Falkland, having just taken part (or just completing) a 'Vertrep' ('Vertical Replenishment'... a helicopter stores transfer) and / or 'RAS' (Replenishment at Sea) with the 'SS Atlantic Conveyor' (with whom she had been sailing the same track with all day), when the 'Air Raid Warning Red Alarm' sounded, and the two ships took evasive action.