I have an Axiom 12 with current Lighthouse and Navionics loaded. This last weekend this T shaped area of the chart was displayed. I have gone through the settings and cannot find where a setting can be changed to remove it. Prior to this the entire chart on the display was bright like the T shaped area. Any ideas or suggestions where to look or disable a setting I may have turned on?
Update, talked to Navionics rep and unbeknownst to me the Navionics on my iPhone had synced with the plotter (I turned off auto connect). The area highlited I had downloaded the most current chart info onto my iphone. When it synced with the plotter it brought in updated chart info for that highlited area only. So they recommended I take card out of the plotter and do an update.