A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: David Pike
Date: 2018 Oct 28, 16:19 -0700
John Howard you wrote:
I think the word PROBABLE covers it. If you look at your GPS you say my position IS here. If you walk, fly, or sail and keep track of your movements you will say my position is probably here.
The point I was trying to make is that although the point might have more chance of being your position than anywhere else, there’s a lot of anywhere else, so depending upon the sources used, the actual probability of you being within a mile or two of your MPP might well be pretty small.
You also wrote:
If you say you will probably be home in half an hour you are saying that the time is an estimate, not exact. Most Probable Position says it is your best guess, but could be off by a bit.
This is especially true when completing boat maintenance jobs and invariably leads to a significant band of error in the order of -0 to +90 minutes! DaveP