The HELIX 5 CHIRP DI GPS G2 is one of the new generation of units from Humminbird. As opposed to the older HELIX 5 DI GPS system, this one features CHIRP sonar technology and also has the AutoChart Live function. In terms of sonar and navigation, this unit offers the same functions as the HELIX 5 CHIRP SI GPS G2. It's equipped with the UniMap charts, which are basically the … [Read more...] about Humminbird Fish Finder HELIX 5 CHIRP DI GPS G2 Review