The cache is less than 1 mile away. To find it simply solve the questions below;
How many windows are visible on the helmet? = A
Look at the green fish; how many pink bits are there and add 2? = B
Check out the date, add first and last digits = F
On the stingray how many light blue dots less 11 = D
Across the whole mural please count the number of air bubbles divided by 8 then add 1 = E
On the large yellow fish what is the difference in the number of spots on the tail and those on its face? = C
N50 48.ABC
W000 26.DEF
Checksum on all numbers in the final location is 59