I BELIEVE IT TAKES NAVIONICS CARTRIDGES. GO TO WWW.NAVIONICS.COM FOR MORE INFO ON YOUR SPECIFIC AREA. I BELIEVE THEY HAVE RIVER CHARTS FROM KENTUCKY TO PITTSBURGH, INCLUDING SMALLER RIVERS, AND SOME LAKES. CHART #811. I HAVE THE CMAP CARTRIDGES FOR MY NAVMAN FROM CAIRO TO PITTSBURGH, SO THIS SHOULD BE SIMILAR. GOOD LUCK.