The coordinates above are not the location of the final cache.
From the starting point at 70 70 163 go to each of the locations to find the required digits.
N 51
Gravel Works
Leigh Beck School
.
Corringham Library
Medway Tunnel
Medway Tunnel
E 000
Gravel Works
Tile Barn Farm near Cliffe Woods
.
Cliffe
ShoreEnd Kingsnorth Jetty
ShoreEnd Kingsnorth Jetty
If your calculations are correct each should give you a two digit number apart from the library. Round this to the nearest 10 then remove the zero.
For library round to the nearest single digit.
Examples of rounding only
If Battle Street = 48 round to 50 then remove 0 = 5
If Troy Town = 62 round to 60 then remove 0 = 6
You can check your answers for this puzzle on Geochecker.com.