NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: leeway
From: Bill B
Date: 2006 Jul 6, 18:27 -0500
From: Bill B
Date: 2006 Jul 6, 18:27 -0500
Gregg R wrote: > Along those lines, is it common in ocean navigation to try to estimate > set and drift (and I'd guess true wind and leeway, too) and factor that > into the DR position estimate? > > I know that in aviation navigation we have to calculate the heading for > a given leg based on wind correction angle, but I've never seen any > reference to a similar allowance being made for that by our ocean-going > counterparts. Can't speak for others, but I certainly pay attention when sailing, especially if steering by compass or a target object. Even on the Great Lakes, where current is minimal, leeway on a fin (especially wing) keel can get up there in a hurry. If the wind allows, I will steer 4-6d above the rhumb lime course going to weather depending on boat, wind, and waves. If I understand, DR is course and speed. Once you factor in set, drift and leeway you are into the area of EP (estimated position). Bill --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to NavList@fer3.com To , send email to NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---
