Lowrance Elite 4 HDI – This video walks you through loading gps data (.gpx files) to a Lowrance Elite-4 HDI depth finder and gps unit. This is an easy action to preform… but it can be tricky to figure out at first. Especially if you are not familiar with navigating through the Lawrence unit. GPS Data thousands of locations can be found through the web. I sourced this file for the US Army Corps of Engineers website. This is a great feature that most modern GPS/Fish Finder units are capable of. Having pre-marked locations of interest is a game change for any angler… especially to us kayak anglers because we have to consider weather, time of paddle and distance of paddle when planning a trip.