NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Optimal HoE?
From: Brad Morris
Date: 2019 Aug 19, 14:46 -0400
From: Brad Morris
Date: 2019 Aug 19, 14:46 -0400
Tony
Some thoughts to ponder
The smaller the HoE, the greater the sensitivity. The accuracy of determination of HoE becomes more critical as the value becomes smaller. 1 meter is very low to the water. Meaning great sensitivity. How did you measure this??
Secondly, are you accounting for tide? I am sure you are, but this can have a significant affect on HoE. Yachts will not be affected by this, but you will.
On Mon, Aug 19, 2019, 2:33 PM Tony Oz <NoReply_TonyOz@fer3.com> wrote:
Hello!
I'm yet to take a sight on a boat, mostly I do my lessons sitting on a bench at ~3~5 meters above the water on a solid shore.
Because there are a lots of people on the beach - I found a more quiet place - a boulder groyne going some distance off the shore. There I sit at ~1 meter HoE.
In the very same weather conditions (almost glass-like water, no wind, no unusual refraction etc) I seems to get relatively big[ger] intercepts. From the higher shore I normally get into 0.2~0.3nm off my GNSS position. From the groyne I got almost a mile: 0.7~1.1nm off.
Is it a coincidence or is there a rule?
What is the usual HoE value on a one-mast yacht?
Warm regards,
Tony60°N 30°E
