The currents around the Point of Ayre have, over the millennia formed a series banks stretching out to the east which, it is advised, should be avoided especially in heavy weather when the seas break over them.
The Ballacash Bank extends for approximately 3 mi (2.6 nmi; 4.8 km) east-south-east from a position 3.7 mi (3.2 nmi; 6.0 km) northeast of the Point of Ayre.
The bank is denoted on maritime charts and marked with the West Cardinal Buoy at position 54°25.59′N 4°13.59′W / 54.42650°N 4.22650°W / 54.42650; -4.22650.
[1][2][better source needed] The buoy is yellow in colour with a black horizontal band.
It is fitted with a light which operates a quick group flash of nine every 10 seconds.