This dataset contains data of an acoustic positioning telemetry study on the Albert canal, in a 200x150 m area directly upstream of the navigation lock complex of Kwaadmechelen, Belgium. European silver eels (Anguilla anguilla) and Atlantic salmon smolts (Salmo salar) were tagged with 69-kHz acoustic transmitters (Vemco, Halifax, NS) and detected by acoustic receivers attached at the canal walls and ship guiding structures of the navigation lock complex. The study comprises 3 deployments between 2015-11-25 and 2017-06-16. At the end of each deployment, receivers were offloaded and the detections were sent to Vemco for processing and calculation of the VPS positions. Additionally, we used the raw detection data to calculate positions by use of the YAPS algorithm. more