A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: John D. Howard
Date: 2016 Oct 16, 09:43 -0700
When you record the time of your sextant sights how do you write down the time? Do you say 18h 37m 36s or do you record 18h 37m 35.75s
In 1/4 th second the GHA of the sun has changed by 0.1' . In one second the GHA changed by .25' if you ignore the v correction. The NA displays data to the tenth of a minute of arc so if the GHA was .04' it will be writen as .0' One second later it will be .29' and be recorded as .3' Two seconds later it will be .54' and recorded as .5' and ........
The point I am trying to make is yes, you can not be shure if the written data in the NA is accurate to .1' arc you can be shure the data is accurate to the nearest SECOND.