Installing a sectional chart.:

1. Download and install Google Earth Pro, which is free. 

2. Download the chart in which you are interested in GeoTiff format, and save it in a location on your computer where it can be stored permanently.

3. Import the sectional into Google Earth Pro by selecting the "Import..." function on the Files menu.  It will complain that the file is too large, and present you with some options.  You should select "Create a Super Overlay".  You will have to provide a suitable (permanent) location for the overlay tiles. 

Turning a chart on or off:

1. If you don't see the sidebar, enable it by clicking the Show Sidebar icon on the toolbar. In the sidebar under Places, you should see a My Places folder with an entry for the sectional chart inside it.

2. The chart can be turned on or off by clicking the checkbox next to the "root" entry for the chart. Generally you will want to keep the chart turned off most of the time so that you can see the Google Earth images.

Simply right click the chart in the sidebar, and choose Delete from the drop-down menu.

(Press BACK to continue.)