Just a thought, but any future Larger vessel may be curtailed in size by the fact that the normal drydock used by the Naval service in Cork Dockyard has a graving dock that measures 164.4m x 21.3m x 8.2m. A floating dock with a lift capacity of 2,000 tons is also available. Any vessel intending to use either of the above needs to be smaller than those dimensions. In Practice only smaller vessels such as the peacocks use the floating dock.