Many ships (Army Repair Ships, Battleships, Coastal Tankers, Coasters, Colliers, Covettes, Cruisers, Destroyers, Frigates, Gunboats, HQ-ships, Landing and troopships, Liberty ships, Minesweepers, Monitors, Patrol ships, Rescue Tugs, Salvage vessels, Trawlers, etc.) were anchored in The Solent, the days before D-Day.

On this map you will see about 800 GPS locations where ship were anchored according the " Operation Neptune Isle of Wight final assembly area plan" : https://www.backtonormandy.org/from-d-day-to-paris/3663-the-solent.html