02 Oct 16 18:37, you wrote to Ben Ritchey:   
      
    EV> In the room I saw a wood Plotting Table that had a map of the area   
    EV> about 100 Miles all around my city.   
      
    EV> Each Square was marked with two letters, EJ was the Grid that showed   
    EV> where my city was located.   
      
   [snip]   
      
    EV> When I was in the Navy, one of the Officers had a Map of the U.S.A.   
    EV> that was marked off in Grids and it showed my home located in the EJ   
    EV> square, like it showed on the Plotting Table at the GOC Filter Center   
    EV> back home.   
      
   this sounds like you are talking about the Maidenhead Locators or the old QRA   
   Locator...   
      
     https://en.wikipedia.org/wiki/Maidenhead_Locator_System   
      
     https://en.wikipedia.org/wiki/QRA_locator   
      
   but the EJ grid you mention seems to be located over the western half of   
   Panama and the southern half of Costa Rica...   
      
   using the MhL, i'm in grid FM... more specifically FM05...   
      
     http://no.nonsense.ee/qth/map.html   
      
      
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