KEY: How to read numbers in lower left corner of 1st map.
Example: The map entry for Target 15 is as follows:

Target   Grid #    Barrels   MM   Type  Range (yards)
   15      342102       4         150     H     14600

Note: 1st Map shows Target 3 (St-Marcouf/Crisbecq) originally having six 155mm guns.
However, those guns were moved and three 210mm guns were installed at Target 3. The 210-mm guns had a range of 32,800 yards -- 18.5 miles -- and they fired on the
USS Corry at less than 3 miles -- virtually point-blank range.


Above: US Army Pre-D-Day Map of Utah Beach Artillery Batteries

Above: "Chart-Map" showing batteries and strongpoints
with grid lines overlay for close-up determining of coordinates.

Source: Grid chart-map from USS Quincy (CA-71) Action Report.  Serial 008.  29 June 1944.
(National Archives)

USS Corry DD-463 home page