NavList:

   

Reply

Hi Michael, very interesting method! I obtained 34 17.8N,128 53.1 via
HO 229 and hand plot. Fix is center of "cocked hat" with triangles of
5,3,and 3 miles.
Mike Burkes
626-833-1521

On Feb 28, 11:32�am, Michael Dorl  wrote:
> Anabasis wrote:A ship is sailing in the East China Sea on 6 January 2009. 
The course is 195 degrees True and is steaming at 10.5 knots. The 1530L fix 
is Lat 34 deg 21.5N'; longitude 128 deg 55.4'E. IE is 0.8' on the arc, height 
of eye is 107 feet, standard temp and pressure. Around 1545L (0645 UTC) a 
3-body fix is taken. Determine Latitude and Longitude at 1545L. At 15h 43m 
Venus is observed at meridian transit with an Hs of 44 deg 25.8' At 15h 43m 
46s the upper limb of the moon is observed with an Hs of 35d 57.0' At 15h 44m 
52s the lower limb of the sun is observed with an Hs of 16d 46.5'I don't know 
anything about the classical methods but wonder how close I came by direct 
calculation.� I did not allow for the movement of the ship between the sights 
or refraction.
> Aires = 100.7797� Time offset =����� 0
> Star�������������� Decl���� SHA���� GHA���� Alt�� T_Day� D� M Year�� T_Year�� C_GHA����� Aires
> venus���������� -11.458� 24.675 231.409� 44.258�� 6.717� 6� 1 2009� 126.717 231.409�� 206.734
> moon������������ 18.982 324.715 171.641� 35.644�� 6.729� 6� 1 2009� 126.729 171.641 206.926
> sun������������ -22.473� 72.556 279.758� 16.739�� 6.748� 6� 1 2009� 126.748 279.758��� 207.202
> �
> Star1���������� Star2������������� Lat1��� Lng1��� Lat2��� Lng2
> venus���������� moon������������ 34.281 230.888 -33.262 187.352
> venus���������� sun������������� 34.282 230.996 -42.148 192.394
> moon����������� sun������������� 34.188 230.888 -29.647 196.834
> Average location���������������� 34.2501 230.9240
> And on the map
>
> �moz-screenshot.jpg
> 25KViewDownload
--~--~---------~--~----~------------~-------~--~----~
Navigation List archive: www.fer3.com/arc
To post, email NavList@fer3.com
To , email NavList-@fer3.com
-~----------~----~----~----~------~----~------~--~---

   

Reply