Quote:
Originally Posted by CaptBongTrillion
Started playing SH5 again when I saw this thread. The research that has been done to make these methods work in SH5 is incredible, and I'm excited to learn more.
I will ask a couple questions since there have been a few folks who offered to take questions.
In the table in Alpheratz's almanac of arc minute and second corrections to GHA, is my time input to the table also GMT - 1 hour like it is above to determine GHA to the nearest 4 hour increment (since my port of departure is Kiel)?
Also, I think I understand how to do the GHA corrections for minutes and seconds, but say if my time input is 2 hours ahead of the nearest 4 hour GHA increment, does that mean in the table of min/sec corrections, I also need to add the corrections for 60min x 2 in order to account for the extra two hours?
I tried figuring out latitude from a Polaris shot and got within ~5 arc minutes but I was using a time input with an hour that matched one of the 4 hour GHA intervals, so I don't think correcting for the hour was necessary. Of course, this could also have been a happy accident because at this point I'm all enthusiasm and zero skill 
Thanks again for the amazing work, navigators. |
I'll be happy to help you, but I'm not sure yet that I understood correctly what you are asking about. I suggest that you write here all the initial data and your specific example of calculations (for example, as I did in video 3.1), then I will tell you if you are doing something wrong.
I created the table for determining the latitude according to Polaris in a simplified form for educational purposes and the accuracy (max error) of determining the latitude from it is 2-3 arc minutes. If your error was 5 arc minutes, you may have been mistaken at some stage. I am currently working on Nautisches Jahrbuch, which will replace Nautical Almanac. Nautisches Jahrbuch will contain a more accurate Polaris latitude table used by Kriegsmarine.
