Fig. 1
From: The impact of underwater waves on ship manoeuvrability: a case study in a fjord
Example of a rightward-propagating large-amplitude naturally-occurring underwater wavetrain observed in the Saguenay Fjord near Anse-de-Roche, located roughly 80 km downstream from Grande-Anse, on 9 July 2007 (after Janes (2008)2). (a) Photo showing the sea-surface signature of the underwater wavetrain. The 8-m long boat seen in the image is the Krill, the Department of Fisheries and Oceans Canada research boat used for sampling these waves. (b) Echogram showing the corresponding internal structure of the underwater wavetrain; and (c) the corresponding horizontal currents (positive towards the right); and (d) the vertical currents (positive upwards), measured from the Krill with a 600 kHz Acoustic Doppler Current Profiler (ADCP). Note that the horizontal axis has been corrected for the Doppler shift caused by sampling a propagating wavetrain.
