NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: DR plotting techniques
From: Stacy Hanna
Date: 2003 Oct 16, 15:03 -0400
From: Stacy Hanna
Date: 2003 Oct 16, 15:03 -0400
The current practice in the Navy is to plot a gps fix at a minimum of thirty minute intervals and DR from that using dividers and rules. Most ships also have some type of computer or laptop with navigation software hooked into the gps but currently the use of paper charts is still mandatory while we work thru the issues of transitioning to the use of ECDIS (Electronic Chart Display and Information System) as the primary navigation plot. -----Original Message----- From: Navigation Mailing List [mailto:NAVIGATION-L@LISTSERV.WEBKAHUNA.COM] On Behalf Of Royer, Doug Sent: Thursday, October 16, 2003 14:15 To: NAVIGATION-L@LISTSERV.WEBKAHUNA.COM Subject: DR plotting techniques I would like to ask the members of the list who sail or pilot power vessels how or what techniques they use to find their DR pos. while underway.I am only interested in what methods you use and don't wish to get into a discussion of accuracy as yet. 1.Do you use paper charts,rules and dividers? 2.Do you use mathematical methods such as the following:Lat=Lf + - e[S/60(cos T*)] ; Lon.=Lon.f + - e[S/60(sin T*/cos Lf)] 3.Do you use chatplotters and gps? 4.Do you use a computer or laptop with navigation software and gps? 5.Do you use gps only? 6.Any other method not listed above or a combination of the above. Steven,thanks for telling me your training.In future conversations I now have a baseline and know how to frame my questions or discussions with you.By the way,thanks for the work you did on the Lunar files.I hope to make some use of them. Jared and Dave,I'll get the brand name of the LED nav. lights when I get to the yard this week to work on the skiff and post that info.