A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Position-Finding
From: Geoffrey Kolbe
Date: 2018 Jun 21, 23:29 -0700
So, the first point of Aries (longitude zero) is defined as the longitude of the sun as it crosses the equator at the March equinox.
The March equinox is defined as the moment the sun reaches longitude zero.
Is this a circular arguement...?