Latitude by Polaris

[EdCa]

Hello All 

My first post, time to dip my foot in the water. 

I'm returning to Celestial Navigation after some decades.  The Mary Blewitt book Celestial Navigation for Yachtsmen gave me nightmares for years and years!

Working my way through David Burch's Celestial Navigation: A Complete Home Study Guide and am struggling to find the Polaris (Pole Star) Tables he mentions there are three corrections a0, a1 and a2 (T-22 in the book).  I've spotted a Polaris (Pole Star) Table 2024 A157 that uses a Q correction, then states that you need to add a figure for refraction. 

Have things moved on since David's book or am I looking in the wrong places?

Thanks 

Sandy

Sandy,

You're doing fine.  Make your life easy- TheNauticalAlmanac.com has what you need- both a form to determine latitude and the 2024 Polaris Q correction;

Determine Latitude using Polaris

Polaris- Correction for (Q) (2024)

All of the above can be found here- https://www.thenauticalalmanac.com/Methods.html

The a0, a1..etc....is fine and well but the Correction for Q is faster and easier.

Give it a try.

Ed