The Simrad EK60 scientific
echo sounder system is frequently applied as a wireless remote controlled
system. Both performance control and data transfer can be managed
by a variety of technologies using different off-the-shelf hardware.
The simplest way of wireless echo sounder data
transfer is by using a plug-and-play off-the-shelf radio link. The
cost is low, and ranges are up to 1000 meters. This is and ideal solution
for rivers and other freshwater applications.
The Ocean Hub project uses several
Simrad EK60s in special water- and pressure proof housings. These
are mounted on the bottom of a Norwegian fjord at 400 m water depth.
The transducers are pointed upwards creating an acoustic fence to
monitor the flux of herring to their winter habitat. The echo sounders
are connected to a remote land station using cables. From there, they
are controlled, and data transferred, by means of a telemetry link.
Vessels of opportunities
A recent trend among Marine
Institutes is to establish a reference fleet of commercial fishing
vessels to collect scientific data. Simrad EK60 echo sounders installed
on fishing vessels are then remotely operated via satellite link from
the respective research institutes. The scientist can take full control
of all echo sounder functions from their own offices.