Passive acoustic monitoring has become a common tool for monitoring tagged marine animals. Recent
improvements in acoustic technology have addressed some of the limitations of the system; specifically, the need to
manually download data and the time delay between detection and data analysis. Coupling a robust passive acoustic
receiver with a satellite communications modem has allowed for remote download of detection log files on a time scale of
the user’s choice from real-time onwards. This coupling has also allowed the user to maintain a watch on the receiver’s
status and thus affect timely repair to avoid loss of data. Using satellite communication is a cost effective means of
monitoring acoustic receiver hardware in remote or difficult to access areas. Because this system requires a surface buoy
for the satellite modem, mooring design is critical and will require careful consideration of the local environmental conditions.
It is recommended that future deployments of this system include a sentinel tag to aid system diagnostics when
tagged animals are absent.