NavList:

   

Reply

Trial and error is just want it is, why use it, if you can find the
error immediatly?
Almost by just looking at a plot. I developed the Franklin Piloting
Techique about 1960 and used it to solve compass erroes problem aboard
other ships that had compass problems and there Azimuth said zero. The
CVS11 in New York, had their gyro and system corrected in the yards at
great expense, Traviled to Norfok VA. and than to her new home port in
RI. In all that time they said they had 0 gyro error. I came aboard in
RI.22 SEP 69. ( after they ran aground, Compass error may had help the
grounding?) They got underway and after their 3rd fix I told the
Navigater that they had 1.5 EAST error. I did not touch the chart I
only looked over the plotter shoulder. It turned out they had a 1.65
degree error. No trial and error for me! I will set up some of my
Writings with mr Brown the past editor of BOWDITCH and RADAR
NAVIGATION MANUAL. The NAVY has been teaching some of my navigation
techiques but The other sea going sailors have not.

On Oct 28, 1:06�pm, "Richard M. Pisko"  wrote:
> On Tue, 27 Oct 2009 15:35:52 -0600, QMCM  wrote:
> > It was in thanks for using
> > several of my articals and introducing The Franklin Piloting, The
> > Graduated perpendiclar bisector, for the three point problem (Sextant)
>
> I read your message #9304, but did not see any of the diagrams. �My only �
> Bowditch is 1995.
>
> I'm interested in resecting my position from three points, mostly from the �
> plane table. �I hadn't seen any instrument that would make it easier, �
> other than a three arm protractor or purpose drawn intersecting angle �
> chart overlays. �Protractors are getting a bit expensive. �Is a picture of �
> your bisector available, with instructions?
>
> Trial and error in making the triangle smaller on a plane table map is �
> pretty quick, if you understand the direction and amount each line will �
> move when rotating the table for a new round of sights. �Two rounds �
> usually gives a very good position, +/- 2 or 3 hundredths of an inch on �
> the map; depending on the "goodness" of the angles to the reference points.
>
> --
> Richard . . .
>
> Using Opera 9.2.4 after the "Dog" died
--~--~---------~--~----~------------~-------~--~----~
NavList message boards: www.fer3.com/arc
Or post by email to: NavList@fer3.com
To , email NavList+@fer3.com
-~----------~----~----~----~------~----~------~--~---

   

Reply