See Wikipedia write up on Ultra Compact – excellent method from Navilst.
CelNav
First British Navigation Manual. Full text. How to do navigation. Lost – try here
1574 “A regiment for the sea” William Bourne
A well presented course with videos and all you need. Source: Overview | AstroNavigation | Vanderbilt University
Course on AstroNavigation with Vanderbilt University
For planning and reducing Stars the “249 vol 1 Air Tables Seven Stars all latitudes” is used, work out the LHA for the given time by adding the GHAaires to the Longitude and use that to enter the table for the appropriate latitude. This will tell you which stars to […]
Sight Reduction Tables for Celestial Navigation
This page provides for download a computer program to calculate and print out sight reduction tables similar to the classic ‘Air Tables’. via Download to generate Sight Reduction Tables: Ocean Sail.
Generate Sight Reduction Tables: Ocean Sail
Excellent sight reduction for Sun, Moon, Planets, Stars. Software. LONG-TERM ALMANAC FOR SUN, MOON, AND POLARIS via Almanac. Umland’s free ebook is superb, on the same site.
Online sight reduction utilities
For sorting out what the astronomical time is, delta T etc. IERS Rapid Service/Prediction Center for Earth Orientation.
IERS Rapid Service/Prediction Center for Earth Orientation
Good for planning astro sights Celestial Navigation Data for Assumed Position and Time. Sometimes goes offline for some reason.