You find where are? 4 times year you do not need any table or chart
Apx March 20 and September 20 at noon is zero
Apx June 20 and December 20 at noon is The axial tilt of Earth is currently about 23.44° off center
Use formula at solar noon for Mar 20 and September 20
Note: Solar Noon is when the shadow line points true north (not magnetic north)
Take a read using a pan of aka Artificial Horizon
Remember it center of sun just take a reading top and bottom advantage the two readings.
? {Artificial Horizon} angle needs to be divided by 2 ?
Now lookup the Atmosphere Refraction angle.?The chart here is in minutes
Now on March 20 or September 20 no adjustment for?D.
Altitude?- 90° =??Latitude?=?D?+/-??
***
Note if on a ship ? using the ocean Horizon you need to adjust for angle from standing to ocean.
If use a bubble sextant instead of a Artificial Horizon no need to divide by two.***
This only works apx March 20 and September 20
The 23.44° or 23 degrees 26.4 minutes. Is only works in ar noon June 20 and Dec 20 by adding or subtracting.
All other you need to use a table or calculate the angle of the sun to determine the sun angle??????
??????
Now if read the internet.
You never be able to do latitude.
Dave
davesmith1800
