haisborough sands (or haisboro sands or haisbro sands) is a sandbank off the coast of norfolk, england at happisburgh. the shoal is long and wide and lies parallel to the north east coast of norfolk. the shoal is marked to the north-west by north by the haisbro light buoy, north cardinal. to the south-east by south is a light buoy south cardinal, and to the west by mid haisbro light buoy starboard hand. in 1995 there were three drying patches recorded to the north-north east and east-south east of the mid haisbro light buoy. except at slack water their positions are indicated by tidal eddies particularly on the north west, and in slight or moderate seas the swell breaks on the shallower parts of the banks. there are several foul patches on the southern part of the shoal. over the years this shoal has claimed many ships.