I downloaded the plugin from the OpenCpn plugin page. The version is 2.0 (perhaps the link should be updated). Where do I find version 4.4? CB=celestial body
Regarding Celestial navigation
must admit I have not used my sextant
in years. Navigated with it from Mid 70's to early 90's. The other day took a sight to check your plugin (my mirrors are in bad shape).
Regarding the “Find” button. A user takes a sight. He is not sure what star or planet it is (Not that familiar with CB's or perhaps it was a partially cloudy day). How does he figure it out? Try one CB click “Find” to see if that is the one. If not, try an other etc etc till the right one shows up. Why not have the software
go threw that search. In the old days I had the selected stars tables and a star finder to identify CB's, so it was easy. I think that the assistance you should give the user is a hint of what CB was used. A star finder button (GetCB) would go the other way than the current
“Find” button. With the data already entered, (date time, lat, lng, Hs and yes to be correct the user would have to also enter the Z) you can figure out what CB was used. WHAT IS THE PURPOSE OF THIS? Just as you have done all the calculations in the background (no more Hs corrections, no more looking up Almanac data , interpolating etc etc) it makes it a little more user friendly.
Regarding Z I ask myself if the additional input can be avoided. The simpler the better. At any given time you will have of the order of 30 navigation
CB's above the horizon. Pick one at random. Take a sight. How many CB's will have a intercept < 30' . I would say the odds are very high that only one meets the criteria.
In the old days use to write navigation
programs for programmable calculators. When it came to the almanac it was limited to the sun an Aries
. At times still give a 40 min crash course on Celestial Navigation not using any fancy terms. The idea is to keep it SIMPLE so people get the basic concept
without getting lost
in the woods. You can go to bebinka.net. In Software view help of “Sight Reduction”. In the 70's wanted a sextant
with one button that would register a sight data (time,Hs,Z). The idea was to point at a CB, click. Point at a second CB click and it would return a fix. The software was no problem. On the other hand at the time the sensors required were still not invented. Eventually they were all invented including a very accurate digital clock that came with a GPS
. So to keep things simple opted for the GPS
. Have a nice day.