The HELIX 5 Sonar GPS, is basically the same as the HELIX 5 SI GPS, the only difference is that it does not have Side Imaging sonar technology. This of course, cuts quite a chunk from its price as well. So, if you would like an affordable and performant fish finder, without SI or DI, this unit is definitely an option to consider.
Although it does not have Side Imaging or Down Imaging, it’s quite a reliable fish finder, with a depth capability of 1500 ft. It has DualBeam Plus sonar, which