Acoustic tags transmit a precise interval or identification code to provide essential presence/absence data for a specific area and time.

JSATS transmitters come in a variety of sizes, weights, and pulse rate intervals (PRIs) to accommodate a range of fish sizes, study durations, ...

Lotek offers acoustic systems to track a wide variety of marine inhabitants, such as salmon, trout, plaice, cod, crabs, sea turtles, and many others.