In-Numri Mystery Cache

20 12 9 5 20 1

19 9 20 20 1

26 5 18 15

20 14 5 10 14

8 1 13 19 1

4 9 19 7 8 1

20 12 9 5 20 1

26 5 18 15

23 9 5 8 5 4

5 18 2 7 8 1

23 9 5 8 5 4

5 18 2 7 8 1

5 18 2 7 8 1

5 18 2 7 8 1

23 9 5 8 5 4

You may decipher the numeric code... but the title might shed some light on the final part of the puzzle  

Note: don't forget a pen/pencil to sign the log! No space for tb. The cache IS NOT at the indicated coordinates. Solve the puzzle to determine the actual coordinates of the container.