Next message: Alexandre E Eremenko: "Observations with pocket sextant in the Baltic"
The observation I reported earlier this month
in Kielerforde had a systematic error of -3.5'
Now I have to agree with George's explanation
that this was the case of anomalous dip.
By now I tested my new pocket sextant
(see the next message) enough, so that the
anomalous dip remains the only explanation.
I also tested my position by a good nautical map.
So a combination of cold water and hot air
can really give such errors, at least in Kielerforde.
Alex
