Portland to Ringstead Downwind Leave Portland Harbour through the marked nearshore turns, then cross Weymouth Bay northeast toward Ringstead Beach. The five plotted points measure about 10.28 km, compared with 10.89 km summed from the source map's labels and its rounded 10 km listing. This is an approximate image reconstruction, not an original GPS track. The photo shows divers at Castletown in Portland Harbour, local start-area context rather than the route. Confirm harbour rules, launch and landing access, tides, wind, waves and vessel traffic before planning. Not for navigation. Geographic reference: OpenStreetMap contributors, ODbL (https://www.openstreetmap.org/copyright). Photo: Mike Smith. CC BY-SA 2.0 (https://creativecommons.org/licenses/by-sa/2.0). Source: https://commons.wikimedia.org/wiki/File:Divers_on_the_Beach_at_Castletown_-_geograph.org.uk_-_425593.jpg. Credit: From geograph.org.uk. Route exported from the stored geo_path. Not for navigation. Portland Harbour (approximate start)-2.448081,50.571439,0 Waypoint 2-2.438893,50.575701,0 Waypoint 3-2.424544,50.569538,0 Waypoint 4-2.410091,50.57616,0 Ringstead Beach shoreline (presumed finish)-2.362214,50.631254,0 Portland to Ringstead Downwind - route#route 1clampToGround -2.448081,50.571439,0 -2.438893,50.575701,0 -2.424544,50.569538,0 -2.410091,50.57616,0 -2.362214,50.631254,0