A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Antoine Couëtte
Date: 2018 Oct 12, 10:44 -0700
Some ships can maintain an excellent DR during 20 minute time-periods at speeds much faster than 6 kts, hence significantly reducing the box of uncertainty.
There is also a proven method to reduce systemic errors, namely observing all around the horizon, provided that dip - our greatest unknown - is constant all around which is most often the case.
"Let me flip it. You managed to improve your accuracy, mid ocean, by 0.5NM. Does it matter?"