Here are some sights taken at Wing on a perfect
(weather wise) day. The results are typical of what I have been
getting for several different Mk IX sextants.
Observation was made from a theodolite tripod
and time taken from a Radio linked digital alarm clock. This had
been synchronised with a time standard radio station, MSF, I think,
though it might be DCF the German station.
The sheet showing my angles and the
time as I recorded them.
I then plotted a graph in the same
book. This enabled me to find the Culmination or highest angle
that the sun rose to, against the time for that event. You will
note it differs from Noon GMT by an amount extracted from the
Equation of Time data!
In the above, the scribbled "data
for Nav" means data fed into Navigator program. Below that
is the output from Navigator program and the difference from the
GPS position. This was extracted from plots made on an Ordnance
I get up to