Wondered whether anyone out there is in need of the old style angling Technics echo receiver.
I came across mine in the garage recently. This is the oblong shaped device, complete with aerial, and powered by a 9 volt battery. Reads off in metres or feet, and has no graphic capability. Simply reads off the depths.
Mine is in vgc and has Its own bespoke storage pouch, as supplied by AT.

If anyone is interested, please get in touch.
Cheers..