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Subject: FW: Personal intro, insertion and resection
From: Royer, Doug (doug.royer@XXX.XXX)
Date: Mon Mar 10 2003 - 18:49:55 EST
wrote the wrong address.
> -----Original Message-----
> From: Royer, Doug
> Sent: Monday, March 10, 2003 15:47
> To: 'Navigation-l@XXX.XXX'
> 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.
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