NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
DR Plotting
From: Lu Abel
Date: 2009 Aug 04, 16:29 -0700
From: Lu Abel
Date: 2009 Aug 04, 16:29 -0700
Does anyone know when constant plotting of courses and dead reckoning positions became commonplace in near-shore navigation? I have both 1914 and 1925 editions of Bowditch. Both contain lots of information about fixing position, not only by bearings and running fixes, but by vertical angles, circles of position, bow-and-beam bearings, etc -- but nothing about keeping a DR plot. The nearest they have to DR positioning is comments on "adding up courses run" to get an estimate of position -- but it's pencil-and-paper calculations, not plotting the way Bowditch teaches today. I'm going to guess that the transition was made in the 1930s because I believe DR plotting was well established by the time of WW II. --~--~---------~--~----~------------~-------~--~----~ NavList message boards: www.fer3.com/arc Or post by email to: NavList@fer3.com To , email NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---
