0700 Hours, 9 December 1942, Trincomalee, Ceylon – Admiral Somerville was on hand as the main task force for OPERATION ZIPPER departed Trincomalee during the morning hours of 9 December. The landing ship RFA Derwentdale and the assault transports MS Sobieski, and SS Duchess of Atholl were transporting the troops of the 29th Infantry Brigade along with additional supplies and equipment for the troops already on Ramree Island. The troop ships were escorted by the destroyers HMS Scout, HMS Foxhound, HMS Hotspur, Spetsai, and Kountouriotis the minelayer HNLMS Willen van der Zaan, the light cruiser HMS Ceres, the old Greek heavy cruiser Georgios Averof, and the old battleship HMS Centurion with Rear Admiral George “Bill” Tennant commander cruisers Eastern Fleet was in command flying his flag on HMS Centurion.
Most of the older ships had been heavily modified. Centurion and Ceres were bristling with 20mm Oerlikon mounts and light machine guns along with a few 40mm pompoms and Centurion had her communications and radar suites upgraded so she could serve as a command ship. Georgios Averof’s 9.2 and 7.5-inch guns were upgraded to improve her ability to serve as a shore bombardment platform. The task force was making a straight-line transit despite the risks from Japanese submarines due to the slow speed of the transports. It would still take over three days to arrive a Ramree Island.