On 22/23 April 1918 at Zeebrugge, Belgium, Captain Carpenter was in command of HMS Vindictive, navigating mined waters and bringing the ship alongside the Mole in darkness. When Vindictive was within a few yards of the Mole, the enemy started and maintained a heavy fire from batteries, machine-guns and rifles. Captain Carpenter supervised the landing from Vindictive on to the Mole, walking the decks, encouraging the men. His power of command, personal bearing and encouragement to those under him greatly contributed to the success of the operation. For his conduct during this action he was awarded the VC.