A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Corrections for latitude when taking sights
From: Brad Morris
Date: 2019 Mar 11, 09:51 -0400
There is no correction for the times of sunrise or sunset for latitude. You are correct.
The two corrections to the time are longitude, to adjust from the central meridian of your time zone, and Equation of time, to adjust for the sun being early or late as compared to our clocks.
If your time keeping is in local apparent time, then your adjustment for longitude is zero. It may be difficult keeping the sundial aligned at sea, but even sundials need the EoT. /s
There is a table for interpolating times for sunrise and moonrise relative to longitude and latitude, Nautical Almanac table xxxii.
Is there ever a reason or need to correct for latitude, for these bodies, if either are a part of a two-body fix? I think not but I wanted to ask.
35 33;097 37
View and reply to this message
What is NavList?
You can also join by posting. Your first on-topic post automatically makes you a member.
Enter the email address associated with your NavList messages. Your posting code will be emailed to you immediately.