It is known for its violent tidal races.

The Bull Rock sits off the western point of the Island in a tidal race.

Graemsay is surrounded by strong tidal races, known locally as roosts.

The tidal race would start in forty minutes, a period of acoustic chaos.

There's a strong tidal race there, and by the time we're that far along, the tide will be against us.

Tend to feed in the up-welling water of the tidal races but can be seen elsewhere.

From the lighthouse it is possible to watch the tidal race, as the two seas clash to create unsettled waters just off the coast.

Litchfield later stated that the reason for sailing fairly close to shore was to enjoy the view and to benefit from the strong tidal race.

These tangles help retain soil, a process which expands the island where the power of tidal race would normally have the opposite effect.