This had to be postponed for a day because of bad weather, but Lord Clive, her sisters and their supporting armada of ten destroyers, nine minesweepers, the seaplane carrier HMS Riviera 2 , four ships to handle the observation tripods, and no less than fifty drifters to handle the explosive anti-submarine nets laid to protect the monitors, sailed to a position about 10 miles off Zeebrugge during the night of 22–23 August. ''