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Minnesota Wing Civil Air Patrol
BASIC GRID TYPE CONVENTIONS
Basic grid types are 1° by 1°. They’re subdivided into 30’ quad-
rants. The 30’ quadrants are subdivided into 15’ quadrants.
Basic grids are referred to by the latitude and longitude of the
southeast corner of the grid followed by the 30’ quadrant letter then
the 15’ quadrant letter if used.
In this example the arrow points to grid 4692 for the entire grid,
4692D for the entire southeast 30’ quadrant and 4692DD for the
southeast 15’ quadrant.
Corners of the quadrants are identified as 1 through 4 beginning in
the northwest corner then moving clockwise around the quadrant.
(i.e. 1=NW corner, 2=NE corner, 3=SE corner and 4=SW corner)
See pages 92-94 of the Apollo manual for details on setting up ba-
sic grid user waypoints.
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