The numbers on this example are purely for demonstration, they will not lead you to a cache.

Go out and find the first waypoint-clue. In this example, waypoint-clue A was found first. Waypoint-clue A has the following values: 2, 5, 8, 2, 5. Write them going down in column A
Waypoint-clue C was found next: 3, 6, 9, 3, 6
Finally, waypoint-clue D was found: 4, 7, 1, 4, 7
You don't need to calculate the missing CRC in B-2, so you can cross it off

(If you skipped waypoint-clue A, cross off A-1 & A-5. If you skipped C, cross off C-3. If you skipped D, cross off D-4.)
To calculate the missing values for B-1, B-3 & B-4, you use the calculate missing values worksheet

(Or A-2, A-3 & A-4 for A; C-1, C-2, C-4 & C-5 for C, D-1; or D-2, D-3 & D5 for D.)
To make things easier, circle the waypoint dropped line, and cross off the skip if dropped boxes line
Now follow the directions in the circled box for each row. In this case, starting with row 1, fill in the values for the first 3 columns. After the "Waypoint Dropped B:", it says "A#" above the first column of boxes. The # is the row you are working on, Row 1 first in this case. So take the value that was found for A-1: "2". Write this in the first box. Next is C#, so C-1 has "3", write that in the second box. Finally D#, D-1 is "4", write that in the third box
Filling in the rest of the values from the found values: A-3, C-3 & D-3; A-4, C-4 & D-4 and A-5, C-5 & D-5
Now we are ready to calculate the missing blocks. We start by following the next direction in the circled line: A# xor C#. Doing Row-1, that is A-1 xor C-1. A-1 is "2", C-1 is "3". To do 2 xor 3, use the 16x16 XOR look-up matrix. We matched 2 with 3 on the matrix: 2 xor 3 is "1"
Write the "1" on the forth box for Row-1
And the final step for Row-1 is "... xor D# = B#". Take the value we just found, "1" then xor it with the value from D# (D-1): 1 xor 4

That gives 5.
Write the 5 in the last box for Row-1
And that gives us the answer for the missing value for B-1: "5"
Jumping ahead to having calculated the other 3 rows
Taking the rest of the calculated values, and putting them on the found worksheet
Now put the values on the coordinates worksheet. Start with the first value, from B-1 "5" (for the coordinates, we skip the bolded CRC boxes)
Continuing with the rest of the coordinates, we have the GPS location of the treasure/log cache

N 053° 45.678 W 012° 53.467 as an example. This example winds up being in the Atlantic Ocean, on the coastal shelf off Ireland. :)
Now it is time to do the proof. Start by circling the waypoint-dropped line for the waypoint-clue you skipped - B in this example
Transfer the CRC values to the proof sheet. Starting with the value from A-1 "2" in the first box
(If you skipped waypoint-clue A, you skip the first box - you can cross it off in that case.)

Fill in the rest of the CRC values, C-3 "9", D-4 "4" and A-5 "5"
Now to the calculations. First is A1 xor C3: 4 xor 5 = "11" - write 11 in the first box
Take the "11" and "... xor D4", D-4 is "4": 11 xor 4 = "15" - write that in the second box
And finally, take "15" and "... xor A5", A-5 is "5": 15 xor 5 = "10" - write that in the third box
That is the proof for this example. That would be the number you can email to us to prove which waypoint-clue you skipped.