It's simple to show how the figures are wrong , if they don't work out .
Think of one example of a ridiculous alt from a theodolite survey at Bryn Celli Ddu .The method was immaterial , the alt was so ourageous it changed the declination enough to make it fit an agenda ,eventually it was appreciated that it wass wrong .
There are multiple ways to find the necessary ,azis , alts and decs . It's what is being offered that matters .
If you don't know how to do that , read the literature .