Back when I was surveying and before total stations were reflectorless, we had to set up our instrument in 2 known locations to observe a point that was inaccessible to determine it's position and height.
See the diagram below and work out the distance from Station A to Point C (x), the distance from Station B to Point C (y) and the height of point C (z).
Once calculated, round your answers to the nearest 0.01m, to eliminate any rounding errors during your calculations.
The ground level at A is 26.184 with an instument height of 1.635
The ground level at B is 27.858 with an instrument height of 1.722
For your answers you can replace the numbers with the following corresponding letters:
x = def.gh
y = jkm.np
z = qr.st
(Note: The same number can be represented by different letters)
Checksum = d + e + f + g + h + j + k + m + n + p + q + r + s + t = 54
The cache can be found at
S 45°51.(q-t)(m-h)(p+d)'
E 170°28.(r-k)(e-f)(s-g)'
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