Fig. 1

(a) Map of study area. Red dots represent HARP deployment sites. Bathymetry data are from GMRT (https://www.gmrt.org/)36. (b) Instrument deployment configuration. One deployment of three passive acoustic recorders from site N shown as an example. Square markers represent 4-hydrophone small-aperture arrays, and circle marker represents the single hydrophone mooring. c) Diagram of instrumentation. Renderings of a 4-hydrophone array and a single hydrophone recorder.