TurtleBox Replacement Charger Dies Easy access to daily chart Tableware Easy access to daily chart updates is available via the Navionics Chart Installer software or wirelessly via the Plotter Sync feature with the Navionics Boating app (The Plotter Sync feature requires the use of the Navionics Boating app on your compatible smart device with an active subscription of the same area It's perfect to use on all fiberglass GEN 2 If your charging port is under the port flap (see photo 1) please select the Gen2 Co ax Round Barrel charger GEN 1 If your TB has 2 ports inside the screw port cap (see photo 3) please select the Mini USB charger