The cache is not at listed coordinates, but you can park your car there. First you have to do a little of brain excercise and then a small walk along the sea on the Velvet strand.......
Hashiwokakero
A = total of double bridges in top row
B = total of single bridges in bottom row
C = total of double bridges in left column
D = total of single bridges in right column
E = total of all vertical double bridges
Final
N 53° E+(E/D).(A+C)A(B+D)
W 006° (D-B-C)(C+D).(B-C)CA
Cache
The cache contains only logbook, please bring your own pen . Please rehide it well to prevent many muggles from discovering it.