NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Sextants in Coastal Piloting
From: Derrick Young
Date: 2000 Aug 18, 2:20 PM
From: Derrick Young
Date: 2000 Aug 18, 2:20 PM
Russell, I am not sure what is happening with the GPS in some areas. There are (that might be were - at least when S/A was turned on) areas where GPS would indicate as much as 20 miles off. One of these areas was the lower Chesapeake Bay and another in St. Louis. If you were piloting using GPS, you were in trouble. So, break out the LORAN (that still works) or the sextant. Take your horizontal angles and you know where you are. The reason that I am not sure is the current status, is that I have not been out on the C'Bay since S/A was turned off - I will be going out in the next couple ow weeks - will let you know what I find. d -----Original Message----- From Russell Sher [mailto:rsher@tellumat.com] Sent: Friday, August 18, 2000 2:49 AM To: 'Young, Derrick' Cc: 'NAVIGATION-L@LISTSERV.WEBKAHUNA.COM' Subject: RE: Sextants in Coastal Piloting Derrick - why wouldn't GPS work very well in some areas as you mention below? regards Russell Derrick wrote......... Carl, Yes, I do teach sextant work for coastal piloting. It is very useful for determining where you are (as you know) in areas where LORAN and/or GPS don't work very well. For example some areas off the Virginia coast line and in the lower Chesapeake Bay. (more...)
