Port Edgar is a marina situated on the south shore of the Firth of Forth immediately to the west of the southern end of the Forth Road Bridge in the town of South Queensferry, Scotland. In previous years it had been the site of HMS Lochinvar. In the inter war period Port Edgar was the a destroyer base. under the command of the then Captain Cunningham who later went on to become Admiral of the Fleet. In recent years, it has become a busy marina with a sailing school with 300 berths, owned and run by the City of Edinburgh Council under the Edinburgh Leisure brand. The failure of successive management structures to maintain harbour depths through dredging since the departure of the Royal Navy continues to threaten activity at Port Edgar, with accessibility at low tides increasingly an issue.