The Orne is a river in Normandy, within northwestern France. It discharges into the English Channel at the port of Ouistreham. Its source is in Aunou-sur-Orne, east of Sées. Its main tributaries are the Odon and the Rouvre.
The Orne flows through the following departments and towns:
Orne: Sées, Argentan
Wikipedia https://en.wikipedia.org/wiki/Orne_(river)
Coordinates 49°10'3.397" N -0°23'18.99" E