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My results calculated from first principles using the nautical almanac
and a plotting sheet were:

Acturus Z=74.9� 2.2m toward
Spica Z=111.1� 3.7m toward
Sirius Z=235.6� 1.6m toward
Moon Z=294.0� 0.7m toward
Capella Z=314.7� 2.2m toward

With the aid of a W&P speed-time-distance slide rule I advanced all
the lines to 1900ZT.  My cocked hat was a small triangle inside a
slightly larger one giving the 1900ZT fix as 14� 12'.8 N, 145� 24'.0
E.

John Cole


On Jun 5, 12:44�am, Anabasis  wrote:
> Exercise #10 Star Fix
>
> � � � � On 7 May 2008 a ship is steaming due South (180T) at 14.2 knots. �At
> startime, a round of stars and the moon was shot. �The 1900 DR (ZD-10)
> is 14 deg 11�N and Longitude is 145 deg 22�E. �Temp/Pressure is 83 F/
> 1010mb, Height of Eye is 106 ft, IE is 0.8� off the arc. �The
> following data was collected (Times in UTC):
>
> Arcturus @ 08h 51m 13s Hs is 23 deg 10.4�
>
> Spica @ 08h 52m 51s Hs is 28 deg 05.4�
>
> Sirius @ 08h 55m 00s Hs is 37 deg 27.2�
>
> Moon (LL) @ 08h 56m 52s Hs 19 deg �56.2�
>
> Capella @ 08h 58m 32s �Hs 26 deg 49.2�
>
> Determine the 1900 ZT Running Star fix. �(Most probable position).
>
> Jeremy
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