HMS OCEAN will depart the capital on Wednesday morning.
The Royal Navy's largest active vessel has been moored at Greenwich for the duration of the Olympics and Paralympics, helping to protect London.
Thousands of members of the public got to go on board the Landing Platform Helicopter (LPH) assault ship on several open days during her stay at Greenwich and tomorrow will be a final chance to wave her goodbye.
HMS Ocean is expected to leave Greenwich at 10.30am and pass through the Thames Barrier by 11am.
The progress of HMS Ocean, and other river activity, can be tracked with a new live map on Greenwich.co.uk, powered by MarineTraffic: Live River Thames traffic map.