 On 13 September 1950 Admiral Sir Philip Vian hoisted his flag as Commander in Chief , Home Fleet , on Vanguard and the ship joined the rest of Home Fleet on exercises with the Royal Canadian Navy and the Mediterranean Fleet . On 19 December , Vian transferred his flag to Indomitable . Nearly two months later , on 10 February 1951 , the aircraft carrier collided with Vanguard as the carrier docked at Gibraltar . The hole in the battleship 's stern was not serious , and Vian re @-@ hoisted his flag in Vanguard shortly afterwards . After manoeuvres with Indomitable , during which her aircraft " sank " the battleship , the ship made port visits in Genoa and Villefranche @-@ sur @-@ Mer before returning for a brief refit in Devonport on 14 March . After completing her refit in May , she became flagship of the Home Fleet Training Squadron under Rear Admiral R. M. Dick at the Isle of Portland . Four months later the admiral transferred his flag to the carrier Indefatigable as Vanguard began another refit in preparation to again become the flagship of Home Fleet . 
