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Author
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Topic: What sight reduction methods do you use in the cel nav course?
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David Burch
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posted February 08, 2006 03:27 PM
"Sight reduction" is the book and paperwork that takes you from sextant sights to a position on the chart. This is done with two books, the Nautical Almanac and some set of sight reduction tables. There are several options on this latter, and that is what the question is about.
Our course covers essentially all sight reduction methods. The textbook includes sample pages from Pub. 249, which is in a sense the main ones we use. Our work forms, however, are designed for use with Pub 249 and Pub 229, and the instructions in the work forms go over the use of Pub 229 and Pub 249. We provide sample pages from Pub 249 rather than 229 simply because we can generate more practice problems with fewer sight reduction table pages using that set.
We also provide special work forms for doing sight reduction with the NAO Sight Reduction Tables (those from the Nautical Almanac Office that come free of charge with every purchase of an Almanac). Our forms are exceptionally convenient and indeed make this set of tables a viable option. We also cover sight reduction by calculator.
From: Starpath, Seattle, WA
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