Holy Socks!!!!
You're not going to believe what I'm about to show you guys...
But first, let me set this up...
Reminder: I still have my sub icon exposed for testing purposes and comparisons. (Pretend it's not there for this example.)
Date: 11 April 1942.
Time: 0807 (showing on the sub's clock. Time zone (+11))
GMT: 1907
Estimated position:
30N 160E Time zone (-11).
Course: 095° True
Speed: 11 knots
I was too slow and just missed getting sunrise so I decided to use the Observation scope as my sextant, measure the sun's altitude and complete a sight reduction to get a line of position (LOP), using the sun's center and the horizon as the angle of interest.
In the following picture the sun's center is about 2.1° above the horizon:
In the next pic, using a real life navigation program, "Navigator", I plugged in the data I just explained and it coughed out the solution that the sun's LOP was 54.6 nm from my estimated position on an Azimuth of 81°.
Well...
take a look at the following pic...it says it all!!! It shows my True position and the Celestial Navigation solution to be just ONE (1) nautical mile difference!!!!
I don't think I can get any closer than that.