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  Try out our "Just For Fun" challenge. Can you solve the Grid Reference Conundrum?
 
CONVERSION of WAR OFFICE GRID COORDINATES to OS NATIONAL GRID COORDINATES
  TASK. Convert this old style War Office Grid Coordinate to OS National Grid
     
160/900
    
Answers to theteam@thebothy.org  
You will need the following information to assist you:

En = A+BEc+CNc

Nn=D+EEc+FNc

Where

En , Nn are National Grid eastings , northings

And

Ec , Nc are War Office Grid eastings , northings

(Expressed as 100s of metres)

and A to F are the coefficients:

A= -420.12
B= +0.99988651
C= -0.0114474
D= -253.7
E= +0.01133218
F= +0.99936218

NOTE Grid eastings and northings should be entered in terms of metres x 10 (-2) Eg. 443210 = 4432.10
             
               
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