 During the operation, X20 and X23 acted as lightships to help the D-Day invasion fleet land on the correct beaches (Operation Gambit), as part of the Combined Operations Pilotage Parties (COPP).Setting out on 2 June, HMS X20 and HMS X23, captained by Honour, arrived in position on 4 June.Due to the delay caused by bad weather, they were ordered to remain in position until 4