Showing posts from December, 2011

Understanding fish finders and the meaning of power

The second boat I owned came with an old Lowrance fish/depth finder. Now, four boats and five kayaks later, I am beginning to figure out these wonderful devices. My recent epiphany came when my Lowrance X85 finder got a significant amount of water inside and shorted out. I had struggled with this finder for about a year. It's very powerful but the technology is old and replacement parts are expensive. After its failure I started looking around at various finders with the goal of spending about $125 for a finder, cover or case and a speed sensor. I settled on the Humminbird 560 (middle photo) and was able to accomplish my goal within budget by finding a fabulous deal Thanksgiving Day. I mounted the transducer inside the hull on my sled and took it out for a test drive. The unit worked great at slower speeds but lost the bottom at higher speeds. I did some test to see if the problem was the location of the transducer, the voltage interference and or the adhesive. No matter what I d