> Their transducer will convert energy into acoustic signals (and vice versa) using a modified device that’s typically used to listen to marine mammals and cost

> Their transducer will convert energy into acoustic signals (and vice versa) using a modified device that’s typically used to listen to marine mammals and costs about $400. That does beat the next cheapest option, the Waterlinked M16 that's $2.4k for 1km range and 10 bits/s. They don't list any specifics about capabilities though.