King William Banks

[3] Edward Tariton, Master of the James, of Liverpool, piloted the King's vessel on its voyage to Carrickfergus.

[3] At approximately 04:00hrs the following morning (June 11) the vessel grounded on a sandbank off the Point of Ayre, Isle of Man, during a period of low water (the bank being uncharted).

The banks extend approximately 6 mi (5.2 nmi; 9.7 km) east-south-east and have a least depth of 2.8 m (9.2 ft).

First marked by navigational buoys in 1843,[4] the banks are denoted on maritime chart AC 2094 Kirkcudbright to the Mull of Galloway & Isle of Man; AC 1826 Irish Sea Eastern Part; AC 2696 Ramsey Harbour; SC 5613.21.1 Isle of Man East Coast.

[5] A lighted buoy, moored 13 mi (11 nmi; 21 km) east of the Point of Ayre, marks the eastern extremity of the banks.