2102-D Star Finder for best sights on USCG Exams

Описание: We discuss typical USCG exam question on choosing best sights; address the issue of "star time" that appears in each one; explain the criteria of "best sights"; find the UTC of star time at given DR position; find GHA and LHA of Aries needed to set up the Star Finder; then set up the Star Finder and outline the procedure for finding the solution.

Recommended earlier video on Star Finder basics is at
   • Star ID with the 2102-D Star Finder  

Referenced articles on star brightness
https://davidburchnavigation.blogspot...
and choosing best sights
https://www.starpath.com/courses/cele...

The 1981 Nautical Almanac needed for all USCG cel nav questions is available at
https://www.starpath.com/catalog/book... with a low cost ebook edition with convenient bookmarks.

We note a source of all USCG exam questions as well as an online Star Finder simulator is available at https://www.starpath.com. The simulator was originally developed by Professor A. Charbonnel in France.

A source of the Star Finder that includes a copy of The Star Finder Book is at
https://www.starpath.com/catalog/acce...

We also show for completeness that this type of best sight determination can be found within seconds using the StarPilot app see at
https://www.starpilotllc.com/
which also solves all other problems in celestial and terrestrial navigation.

Further for completeness, here is a comparison of all the best ways to predict best sights; some attractive solutions are sadly not usable on the USCG exams.
https://davidburchnavigation.blogspot...

Video index
(00:00) Define the problem
(04:55) Define “star time”
(07:37) Explain "best sights"
(11:01) overview the math
(12:41) Convert DR time to UTC
(12:54) Find twilight times in the Almanac
(16:54) Find GHA and LHA of Aries
(18:29) Set up star finder
(22:41) Review the solution
(23:18) Show StarPilot automatic solution