​Here is the Penn Pilot Site and some instructions to make it easier to use.
1.  Where it says: enter place name, city/state, etc.; type the city/state closest to your target area.
2.  From the “Select Era” drop down menu; select the time period you prefer.
3.  Using the 4 arrows in the direction circle in the upper left corner of the screen, center your target area on the screen.
4.  Click the plus sign in the upper left corner of the screen to zoom in.
5.  You should see rows of red dots that represent photo locations.  Use the arrows and + and – buttons to find a map scale with road and town locations you can use to navigate to your target area.
6.  When you reach your approximate location, click on Aerial in the tool bar at the top.
7.  Find the red dot closest to your target location and click on it.
8.  A brief summary of the photo information will appear.  Click on the plus sign to see the larger screen photo image.
9.  If this is the correct photo and you want to download it, click the appropriate button and download at your chosen resolution.  You may need to look at different photo locations to see which one has the best image of your target area.

The Military Grid Map has access to a satellite image with the military grid superimposed on it to permit detailed description of map locations.  To reach a specific location, do the following. 

1.  At the first screen, notice the red cross in the center.  Put your cursor on the approximate map location you want to enlarge.  Left click and move it to the red cross.
2.  In the upper left corner of the screen, notice the + and – signs that can be used to change the scale of the map on the screen.  The plus increases the scale (zoom in), while the minus decreases the scale (zoom out).
3.  In the upper right corner is a drop down menu titled t1 Terrain.  Click on it and then click on:  h Aerial Google Hybrid.
4.  Enlarge your map and adjust the location until you reach the scale you desire.  The 100 meter square grid is quite clear.  The 10 square meter square grid is a little fuzzy, but useful for some purposes.