| 1. | Tidal races and other strong currents have special chart symbols.
|
| 2. | Graemsay is surrounded by strong tidal races, known locally as " roosts ".
|
| 3. | Tend to feed in the up-welling water of the tidal races but can be seen elsewhere.
|
| 4. | The dangerous coastline has proven more hazardous due to the strong tidal race known as the Portland Race.
|
| 5. | The island's irregular coastline approaches mainland Machangulo Peninsula at Ponta Torres where a tidal race separates the two headlands.
|
| 6. | Tidal races on the west coast at Kylerhea between Skye and Crinan and the Gulf of Corryvreckan also offer significant prospects.
|
| 7. | The " Grey Dog " tidal race, which runs in the sea channel to the south, reaches 8 knots in full flood.
|
| 8. | These tangles help retain soil, a process which expands the island where the power of tidal race would normally have the opposite effect.
|
| 9. | From the lighthouse it is possible to watch the tidal race, as the two seas clash to create unsettled waters just off the coast.
|
| 10. | 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.
|