"Centaur" was refitted in Portsmouth Dockyard between June and November 1963, during which she was fitted with a large Mirror Landing Sight on a sponson on the port-side of the flight deck and a Type 965 air search radar was installed on a lattice foremast (taken from the Air Direction Destroyer "Battleaxe", which had been earmarked for disposal, after being badly damaged in a collision the previous year) at the front of her island. More air-conditioning units were also installed and further improvements were made to her Operations Room. Whilst alongside in Portsmouth in October she sustained slight damage to her bow, when the submarine HMS Porpoise collided with her after being caught by the ebb tide.