The PiranhaMAX 4 is also one of the newer models of the P-MAX series from Humminbird. It's actually the unit which basically replaced the PiranhaMAX 197c which was discontinued. It's not much different from the older unit, but does have a wider display. This Humminbird PiranhaMAX 4 is a standalone fish finder, just as the PiranhaMAX 4 DI. In other words, it does not have any … [Read more...] about Humminbird Fish Finder PiranhaMAX 4 Review