JW Fishers Multifrequency Transponder

Multifrequency Transponder by JW Fishers The acoustic sonar transponder from JW Fishers enables relocating an underwater location or piece of equipment quick and simple. Attached to an underwater position, the sonar transponder patiently awaits a coded signal from an acoustic sonar interrogator. When a diver equipped with an acoustic sonar interrogator places the interrogator in the direction of a transponder, the transponder emits a coded return signal that is detected by the acoustic sonar interrogator. The interrogator displays the transponder's distance (in feet or meters) and a compass indicates the transponder's direction. The signal may be followed directly to the destination by the diver. The acoustic sonar transponder may emit any of sixty (60) distinct frequencies (selectable by the operator), allowing many units to be placed in the same approximate region without interfering with one another. The diver is steered straight to the acoustic transponder by setting the acoustic s