Here is a link to a web-site showing the acoustic telemetry projects in the Great Lakes.
Great Lakes Acoustic Telemetry Observation System
There are some pretty interesting things happening out there.
Jon
Then there is the downside of owning a Yeti: having to lock it up. My favorite new ridiculous cooler is the 6 pack sized Pelican soft-side that costs $350 and is......wait for it.......black. Rocket scientists.