Small handheld depth sounder, of extremely simple operation, particularly intented for pneumatic or dinghy sailors.
Equally useful to scubadivers : it gives depth indication relative
to the bottom, distance to a rock or to an underwater quay.
Totally waterproof, the Echotest II sounds up to 80 metres,
and can be used at a maximum depth of -50 metres.
Echotest operates only when immersed.