The OSS believes firmly in swimmers freedoms - and this section of the site is designed to give you more of the tools you need to explore the world's rivers, lakes, tarns, lochs, oceans and seas.
Use the drop down menu to find your way around, or these shortcuts (we plan to have a new website during summer 2015, but for now drop downs aren't working on i pads... inconvenient we know).
This section of the site covers:
With many thanks to Lynne Roper for her research and writing.
Photo: Vivienne Rickman Poole, swimming snowdonia.