This cache series was originally developed by Maryland cacher MDSurveyor. This will be the second P.O. Box cache in northern Delaware.
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This is a simple puzzle once you learn how to apply these sets of three numbers for the cache. (Grid:Row:Column) shown as Gxx:Ryy:Czz
Grid:
The Post Office will have multiple walls with post office boxes. A normal group of boxes is about 5 feet tall by 2+ feet wide and a wall may have from one group of boxes to many groups of boxes. The Grid refers to ALL of the groups of boxes on any particular wall. Each wall of boxes is considered a separate Grid and there is only one Grid per wall. (Exception, if a wall has a door or opening that separates a set of boxes from another set of boxes then each one of those different sets of boxes would be a separate Grid.)
The Grid number is determined by the number of the P.O. Box in the upper right-hand corner of the Grid.
Find the P.O. Box number that matches the Grid number and you are standing in front of the Grid you need to use.
A Grid has rows of boxes that run from left to right and columns that run from top to bottom. The P.O. Boxes at the bottom of the grid are usually bigger than the boxes at the top. The rows will normally lineup across the entire grid, but the columns will not. There will be more columns on the top of the Grid and less along the bottom of the Grid.
Row:
Starting at the upper left corner of the Grid and counting from top to bottom, the top Row is 1 the next Row down is 2 and continuing on to the bottom of the Grid.
Column:
Counting from left to right, the left most box is Column 1 and the next box from the left is Column 2 and continuing on to the right of the Grid. Warning, Row 1 will probably have more Columns than Row 9, so be sure to be counting across in the correct row (That is why the Row number is given before the Column number).
Find :
G9460:R8:C10
and
G8010:R4:C5
North coordinate: 39 D 40 AAA
Where AAA is G9460:R8:C10 minus 9117
West Coordinate: 75 D 44.BBB
Where BBB is G8010:R4:C5 minus 8034
Math check: The sum of digits of AAA is 11. The sum of digits of BBB is 16
The Newark Post Office Lobby is open 24 hours.The cache is NOT in or next to the building, but is a short drive away