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Charleston Under Siege! Mystery Cache

Hidden : 07/18/2007
4 out of 5
1.5 out of 5

Size: Size:   small (small)

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Geocache Description:

Charleston is under siege for the first time since 1865! Three Enemy PT boats and a Battleship have been seen lurking in Charleston Harbor threatening our landmarks. They must be located and sunk! We’re counting on you, sailor.

Below is a modified Battleship game board which consists of a 5X5 grid. Hidden on the grid are 3 boats,all of which are the ever-elusive "2 holed" PT Boats, named PT-1, PT-2, and PT-3. To find the coordinates of the battleship (final cache), you must first locate these 3 PT Boats. Once they are located, you will have to do some slight calculations to obtain the coordinates of the final cache (battleship).

To fire a shot, simply visit the location of one of the 25 virtual targets on the Charleston peninsula. There are no cache containers at any of these locations. Determine if the answer to the question for that location is true or false. If the answer is true, it is a "hit"; if the answer is false it is a "miss". There is no need to go to all 25 locations, but you will need to find all 3 PT boats (2 "hits" per boat for a total of 6 "hits") in order to obtain coordinates for the final cache.

  1 2 3 4 5
A N32º 46.733
W079º 56.080
3 red doors and 2 lanterns are visible on west-facing side
N32º 47.247
W079º 57.616
Bible verse here is John 3:16
N32º 46.843
W079º 55.887
Plaque at left has 9 words beginning with "C"
N32º 46.850
W079º 55.629
Commemorated June 1975
N32º 46.680
W079º 55.761
2nd story features 5 arches
B N32º 46.195
W079º 55.719
Age of last victim on plaque is 84
N32º 47.474
W079º 56.091
6 arches under front porch
N32º 46.169
W079º 55.742
Base of statue has 7 sides.
N32º 47.203
W079º 56.180
Date found here is January 1781
N32º 47.414
W079º 57.610
Number of ticket windows + light towers = 10
C N32º 46.606
W079º 55.628
On plaque that begins "South Carolina" last word is "peace"
N32º 47.290
W079º 55.855
4 words totaling 29 letters are seen on the front of the large building on the north side of the street
N32º 47.476
W079º 55.575
According to sign, New York is 645 miles away
N32º 47.095
W079º 56.280
Gift of the Class of 1998
N32º 46.803
W079º 56.403
Circa 1887
D N32º 46.300
W079º 55.683
Last 4 digits of phone number on sign are 6262.
N32º 46.555
W079º 56.476
Benches surrounding lake are painted red
N32º 47.909
W079º 57.418
Dedicated on 25th anniversary of mayor's tenure.
N32º 46.684
W079º 55.508
"Please enjoy ankle wading on the first step only"
N32º 47.122
W079º 56.833
Time capsule to be opened in 2024
E N32º 47.419
W079º 56.228
Garage clearance is 10'2"
N32º 47.922
W079º 57.636
USMC 568
N32º 47.357
W079º 56.136
Replica dates to 1969
N32º 46.772
W079º 55.810
Map on plaque was printed in 1705
N32º 47.187
W079º 56.111
In memorium 1945

Once you have determined the position of all 3 PT boats, you will need to determine the orientation and move some numbers around some. Here is all the information you will need to figure the final coordinates:

  • On the grid, North is "up".
  • PT-1 is not traveling the same direction as PT-3.
  • PT-2 is the easternmost boat; PT-3 is the southernmost boat.
  • All PT boats are either heading north or east.
  • For translating rows to numbers, A=6; B=7; C=8; D=9; E=0. The front portion of a PT boat represents the columns (numbers 1-5). The rear portion of a PT boat represents the rows (numbers 6-0).


Final Coordinates:


Latitude: N 32º 46. (PT-1 rear)(PT-1 front)(PT-2 rear)
Longitude: W 079º 56. (PT-3 rear)(PT-2 front)(PT-3 front)

The final cache is an ammo box hidden somewhere on the Charleston peninsula. Find it and the battleship will be sunk and Charleston saved from sure destruction! Move fast, sailor—the entire Lowcountry—nay, the world—is counting on you!

The final cache is currently a lot smaller than an ammo box. While I find a worthy cache for such a puzzle, a replacement cache is waiting at final coordinates. Please bring your own pen (for now) and happy hunting! ~ Radbme, 1/2022

Many thanks to brdad, whose Bangor, ME cache "You Sank My Battleship!" was the inspiration for this cache!

Additional Hints (Decrypt)

Haqre lbhe srrg orfvqr n cvyyne.

Decryption Key


(letter above equals below, and vice versa)