51°14′00″N 1°57′00″E / 51.23333°N 1.95000°E
The Sandettie Bank (French: Banc de Sandettié) is an elongated sandbank in the southern North Sea, more specifically about in the middle of the northeastern entrance to the Strait of Dover. North-west of it are the hazardous Goodwin Sands, south of it the sandbank Ruytingen.
The shoal represents a significant threat to the major shipping lanes in the Strait of Dover. From 1902 to 1989 it was marked by a succession of French lightships, all bearing the name Sandettié while deployed there. The last such crewed lightship is now a museum ship at the Port Museum of Dunkirk at anchor.[1]
Today the British authority Trinity House maintains an uncrewed lightship there, the Sandettie Light Vessel Automatic which also has an automatic weather station.[2]