The buoys used for racing are not always easy to distinguish from other mooring buoys in the lake, but the map below shows the relative positions.
(Note: this plan has now been updated as of April 2008. At the bottom of this page, there is also a Google Maps link which gives another view of this link; it does have the advantage that it can display the lake as an aerial view))
Link to Google Maps plan of Tamar Lake Buoys
(Note that you can switch between a map view or an aerial view, by clicking the tabs at top right of map; clicking on a buoy identifies the name)