David Burch Navigation Blog
Notes on marine navigation and weather
Monday, April 22, 2024
Choosing the Best Sextant Sights
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The criteria for choosing best sights is outlined in the Star Finder Book and in the manual to the StarPilot programs, but this online cour...
Friday, April 5, 2024
Role of the Safety Depth in ENC Display
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When viewing an official electronic navigational chart (ENC), the user selects three depth contours (shallow, safety, and deep) and also set...
Monday, March 18, 2024
A New Revolution in Barometers
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We have worked for many years promoting the use of accurate pressure in marine navigation, which had literally fallen out of all standard te...
2 comments:
Thursday, March 14, 2024
Special Uses of the Star Finder and Sight Reduction Tables
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The 2102-D Star Finder is essentially a hand-held planetarium designed for mariners to assist with celestial navigation. It can be used to ...
Wednesday, December 13, 2023
How to Remember the Equation of Time
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On Valentine’s Day, February 14, the sun is late on the meridian by 14 minutes (LAN at 1214); three months later, it is early by 4 minutes (...
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