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    FW: Personal intro, insertion and resection
    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.

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