Howdy Vanjast.
I'm snuggling up to 70yo and have been using Celestial Nav via sextant before the USN quit teaching it at Annapolis; however, when I saw your post re RelNav...I took the bait and had to give it a try.
Some of us have been scratching our beans trying to adapt CN into this Sim since it first appeared on the market. We always came up short as we discovered the celestial canopy was close to real (eye candy) for the war years, but no cigar...if you know what I mean.
I'm running a patl just west of England at 53° 40'N, 001° 25'E.
Time: 16:00 GMT...see below. I'm using your mod and as you can see, the sextant reading is about 9° off from "Navigator's" starfinder, or somewhere out in the middle of the Atlantic (540nm).
If I'm doing something wrong...please correct me, or if I'm using the sextant at the wrong times..please let me know.
At sea the sextant was used at dawn (morning round of stars), again around 0900 to get a running fix, Noon sight & fix (for etmal), about 1600 to get another running fix, and finally at evening twilight fix with round of stars. (unless wx was overcast).
Please post how to successfully use your mod.
Tnx,