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Old 07-26-13, 01:41 PM   #1
Sjizzle
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Default [TEC] Real navigation Tutorials

in this thread i will try to show u how to fix your position on the map without using the navigator From the game with TDW's UI and MagUI when DrJones will release the new version of the MagUI.
The math and others calculation are same with both UI's but there are difrent sextant.
Remember

we don't have a real sextant to calculate the sextant index error and make some other correction so we can be 100% accurate

First Tutorial:

Finding The Latitude

1. Noon Latitude

"Local Noon" is the exact time when the Sun reaches its highest point in the sky. This is also the time that it crosses the vertical, imaginary line, that astronomers call the "meridian".
This is a very simple method enabling the observer to determine latitude by measuring the maximum altitude of the sun (or any other object).
No accurate time measurement is required. The altitude of the sun passes through a flat maximum approximately(see noon longitude) at the moment of upper meridian passage (local apparent noon, LAN) when the
GP of the sun has the same longitude as the observer and is either north or south of him, depending on the declination of the sun and observer’s geographic latitude. The observer’s latitude is easily calculated by forming the algebraic sum or
difference of the declination and observed zenith distance z (90°-Ho) of the sun, depending on whether the sun is north or south of the observer.



now let's see this in game all what wee need is the alamanac from 1939 - 1945
an online almanac can be found here Click

to measure the sun angle click on the navigator the sextant and u will see the screen


after that click on Enable Sextant and align the te sextant to the water line ( horizont )



now search for the sun and measure the angle of the sun





as we see we have the sun at 42.54 degree no let's do some math to find the latitude
first we need to find
Zenith Distance = 90 - 42.54 we convert the 90 degree to 89.60 - 42.54 = 47.06 is the Zenith Distance
now let's see the sun declination at 1939. sept. 01 12:00 PM


Sun declination is N 8. 31 so now let's see we are in the same hemisphere ( N ) but the sun is belove us so we apply the
Latitude = Zenith Distance + Declination
Latitude = 47.06 + 8.31
Latitude = 55.37

now let's what the navigator say about our latitude



whoop 55.37 N pretty nice ha ?
if u find your latitude then u can find your way home or your destination at sea

when DrJones will finis the MagUI new version i will show u also with that UI mod.

PS.

if somebody have an 1939 - 1945 .PDF almanac and can share it with use i really apreciate it thx.


Last edited by Sjizzle; 05-01-14 at 04:46 AM.
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