No, not stable because the window is above all other windows and this is unpleasant
can't reproduce - the window is above opencpn's window all the time, same as for example the grib plugin's one. This is intended.
What are the units for F, H, X, Y, Z, Incl, Decl ? Is it possible to write these units in each line ?
F, H, X, Y, Z - unit is nT - nano Tesla
Inclination and Variation - degrees
There is no "Decl" and the units are shown in all the fields in 0.2 - are you really using this new version?
It would be nice if there was a button on the "Boat" of the extended display. This button would go to shows simplified and vice-versa.
I want to keep the window as small as possible, that's why there's no button.
logfile is .log - the plugin writes a message in the logfile if the WMM.COF file is not found and it uses the bundled data. For the time beeing not having that file is ok, for the next epoch, you can use the new one when it's released by NOAA.
In the OpenCPN manual Andres has changed a part of my text on the page Supplementary Software/Magnetic Variation, and added: "(historically called in navigation domain: magnetic declination. Magnetic variation is the physic term)".
I don't mind the change, but don't agree. Attached are two pages from two ancient navigation textbooks: " 'T Vergulde Licht Der Zeevaard" (by Klaas Hendriksz. Gietermaker, 1774, in Dutch) and "The New Practical Navigator" (by John Hamilton Moore, 1807, in English, being the text on which the original Bowditch was based). Both use the word "variation", not "declination". In my opinion "declination" is the physical term.
My dutch begins and ends with "egel in da kooi" and even that is probably wrong , but the other sources in languages I actually understand say variation is the term we should use while navigating. I actually care much more about the numeric value I have to add or substract to get the magnetic course to steer than how it's called. My very internal feeling is we probably should send a beer to the declination lovers who actually gave us the formulas and data to compute it
Anyway, variation is going to be the term this plugin is going to use "officially".
"The earliest known reference to the existence and influence of magnetic declination on navigation is generally attributed to Columbus, during his first voyage to the West Indies, in 1492, who reported having observed a ‘true meridian’ (meridiano vero), where the magnetic declination was zero, near the Azores archipelago. Also, the name given to Cape Agulhas in the Cantino planisphere – Cabo das Agulhas (‘Cape of the Needles’) – is an indication that the magnetic declination in the area was close to
zero at the time and that the phenomenon was observed and registered during some exploratory mission that preceded the making of the chart13. The Portuguese pilots used the verbs nordestear (to point ‘eastward’) and noroestar (to point ‘westward’) to express the tendency of the magnetic needles to point to the east or to the west of the geographic North."
This was confirmed by D. João de Castro (1500-1548), who made the earliest known systematic measurements of the magnetic declination during his trip from Lisbon to India, in 1538. In the Roteiro de Lisboa a Goa (‘Rutter from Lisbon to Goa’), on 5 July 1538, he writes: ‘this Cabo das Agulhas is the place where the pilots have the precept that their needles don’t show any variation’ (este Cabo das Agulhas é o lugar onde os pilotos têm por maxima que as suas agulhas não variam coisa alguma). See Castro (1538).
FROM THE PORTOLAN CHART OF THE MEDITERRANEAN TO THE LATITUDE CHART OF THE ATLANTIC - CARTOMETRIC ANALYSIS AND MODELING
Joaquim Filipe Figueiredo Alves Gaspar