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2102-D Star Finder for best sights on USCG Exams

David Burch

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2102-D Star Finder for best sights on USCG Exams

1 509 просмотров · 2 года назад
David Burch
7,87 тыс. подписчиков
1 509 просмотров · 2 года назад
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