NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
FW: Personal intro, insertion and resection
From: Doug Royer
Date: 2003 Mar 10, 15:49 -0800
From: Doug Royer
Date: 2003 Mar 10, 15:49 -0800
wrote the wrong address. > -----Original Message----- > From: Royer, Doug > Sent: Monday, March 10, 2003 15:47 > To: 'Navigation-l@listserver.webkahuna.com' > Subject: Personal intro, insertion and resection > > Mr. Huxtable suggested I give you my background.I am an active 2nd officer > on various commercial vessels of unlimited tonnage.I was explaining to > someone on another sight how I require all members of the nav. watch on > any vessel I'm serving with to practice traditional methods while on duty, > time and conditions permitting.This includes Celestial and Coastal nav. > using a sextant and useing a manouvering board in conjuction with radar > for collision avoidance.I am astounded some of the replies stated they > were suprized that professional mariners still use these techniques.They > are still requirements of the Coast Guard for an officer.I practice as > much as possible and require them to make the effort.Only through practice > comes skill and confidence.That said,I have a great deal of practical > experience in everyday navigation but after reading the discussions here > know I will have to bone up on my theory. > As for Insertion and Resection these are terms used in navigation on > land.This is a traditional navigation technique dating back many years > before the advent of GPS etc.In fact these techniques are still taught to > military people,hikers etc.A projection is needed.Usually a UTM or > Military projection.The use of a mil-compass is also needed.Mil does not > stand for military but mil:1,000th of something.The mil-compass is hand > held and has 6,400 seperate & equal segments in 360*.The compasses are > also known as lensatic compasses.You can get great accurecy in > distance,height and position useing the mil.We can go into detail of the > mil if someone is interested in furthering this discussion.Insertion is > the term used for going to a distant position from your present > position.Resection is the term used to get away from the position you are > holding to a distant position.In and out.Insertion = in;Resection = > out.This is actually rather fun to do.Useing the projection to plan and > execute your route and then executing it across the terrain within your > route. > Also,you reverse the sign of the reading on the certificate inside the > sextant box to arrive at correct Hs. > I hope to be talking to you folks soon.