I have a very old DataMarine unit. The transducer is a hemi-sphere the size of a bowling
ball (1/2 full of water), glued to the hull (of a Ranger 33 sailboat). The display had
Numitron display tubes, but they failed and I had to replace them with LEDs. It works
fine.

On Mon, 2 May 2005 17:06:45 -0700, "JG" wrote:

Which one do you have? I had a low-end fishfinder. Just sold the boat, and I
can't remember the brand.