The above coordinates are for "Steinkirken", not the cache.
Steinkirken = The stone church
This is the first Norwegian sudoku mystery.
The cache is located not far from "Steinkirken". To find the exact position you must solve the sudoku puzzle, and find the numbers in square a-f
Rules:
Each row, column and 3x3 box must contain the digits 1 through 9 exactly once.
The cache is located at N59° 50.abc E10° 52.def