THE CACHE IS NOT AT THE LISTED COORDINATES, so please don't go wading out into the water. The cache is located a short distance away, so all you need to do is solve the puzzle below to determine the location of the cache.
The puzzle below will give you three clues. Use clue "A" and clue "B" to bring you to a specific location. Once you are at that location, you will use Clue "C" to find a SMALL green sign. Use the information on that sign to get the final coordinates.

Final coordinates are N 40 43.RST W 074 00.XYZ
R = Number of letters in the first word on the sign.
S = Number of times the letter "A" appears on the sign PLUS the number of times the letter "N" appears on the sign.
T = Number of letters in the third word on the sign.
X = Number of times the letter "X" appears on the sign.
Y = Number of letters in the second word on the sign.
Z = Number of times the letter "L" appears on the sign PLUS the number of times the letter "O" appears on the sign.