Star
of Polaris (Navigation Sum)
At
the top of the page write down the Latitude/Longitude
If
not G.M.T. time given then convert it to G.M.T. time
Using
a Nautical Almanac (using the date) find the declination (under
the G.H.A. Column)
At
the back of the Nautical Almanac find in the increments add
this to the declination (Always add it)
Place
the Longitude below the final Declination (+ if East - if West)
Add/Subtract
to give L.H.A. Aries
In
the pages with "Star of Polaris" in the Nautical Almanac
(find the True Azimuth at the foot of the page)
Polaris
Example
(G.M.T.
02hrs 36min 42sec) (Longitude 021 27.0o West) (Variation
012o West) (Gyro Bearing 001o)
| G.H.A.
Aries |
084
17.3o |
| Increments |
009
10.5o (+) |
| Correct
G.H.A. |
093
27.8o |
| Longitude
(W -) |
021
27.0o (Add East Subtract West)
|
| L.H.A.Aries |
072
00.8o |
True
Azimuth = 359o (True Azimuth is your True Bearing)
