Some of these corrections are in the Almanac; the others depend on you concours ingénieur territorial and your instrument.
Celestial Navigation Net, last updated on February 03, 2013.
Noon_sight : Sun LAN fix ( download ).Obviously my garden (sorry, "yard isn't heaving up and down so one expects a rather better result.The resources below will help: classes AND home study The very best place to get a real grip on the practice, in my opinion, is by macif reduction voyage taking a good course with an expert, especially one that gets you out on the water or at least.I made the following idées cadeau parents pas cher worksheets to make navigating small sailboats easier, safer, and more accurate.I made these sheets for my own use.Latitude Hooks and Azimuth Rings, and in David Burchs magnificent.This is especially important in star sights, as you only have the short time between civil and nautical twilight when the horizon is still visible, while some stars are bright enough to be seen.Cpa : closest point of approach from two ranges and relative bearings ( download ).Your observed altitude (steps 1-3 below) is compared to a calculated altitude (steps 4-5) calculated to be what altitude you would get if you were actually at the position you chose as your assumed position.(If the calculated altitude is greater, you are farther away from the assumed position; if it is less than the corrected sextant altitude, you are closer; the difference between the two is the number of nautical miles by which you need to change your assumed.
(Click on Publications in the left menu; on that page, use the drop down menu to find the sight reduction tables).
There are some corrections to be made here.
Instead, take HP for Venus from the bottom of the daily page and add HP*cos(Hs) to the sextant altitude.This website cannot teach the actual practice of celestial navigation; however, by reading these pages, you should be able to move on to an on-site or correspondence course with an understanding of what you are doing.Running_fix : running fix (LOP1 advanced in time) ( download ).Buckley,., has a great chapter on how to do sun sights in his book on a transatlantic crossing by sail, Airborne: A Sentimental Journey (1970).Ground_speed : from vessel speed and set and drift ( download ).