The main objectives of this study were to close the seasonal (winter/spring) gap in data on harbour porpoise activity in the Minas Passage and to determine detection range (distance from hydrophone) and performance in relation to varying tidal conditions for each of the hydrophone technologies.

This study invovled deployments of multiple, calibrated C-PODs and an icListenHF hydrophone, for the deepest sites at the FORCE Lease Area.