[Therion] Magnetic declination

[Martin KERN]

Quick question concerning the magnetic declination.

How you indicate it?

Just by entering the date or with the command <declination>?

Because when I just specify the date, the declination which is calculate is
for the first January, even if I specify another month in the centreline
(e.g. 28.08.2017). Consequently, centreline is slightly offset that if I
enter the real declination for the date.

I don’t know if this shift is important for survey accuracy or if I can
ignore it ?



Thanks and sorry for all my questions.

Martin K.
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