
Sight Reduction and 
Dead-Reckoning problem     Leg 19  092596   Test your knowledge!
----------------------     ------  ------   --------------------

on the morning of 03-06-96 we take the following round of sights. Our
Estimated Position(EP) is (35d 03.3'N  17d 47.6'E).

    GMT             Body            Hs            Zn
    03-31-25        Polaris        35d 13.3'      000.9d
    03-40-22        Fomalhaut      22d 53.4'      161.5d
    03-55-10        Moon LL        12d 31.2'      235.4d
    

1)  What is the FIX? Use the time of the first sight for
     plotting.
--  -----------------------------------------------------

2)  What is the Dist traveled and the TCmg from our previous FIX at
     (35d 28.3'N   16d 12.0'E) to our latest FIX?
--  ----------------------------------------------------------------

Current Set 0.4, 125d. Var 00.0d, Dev 4dE. Speed 9.0 Kts.

3)  What was the CCmg and SMG between the two FIXes?
--  ------------------------------------------------

4)  What was the time we traveled between the two FIXes,
     to the nearest minute?
--  --------------------------------------------------

Our original calculated TC was 107.7d. There seems to be a slight
descrepency between our original TC and the actual TC. Unable to
resolve the reason for the anomaly, we replot our course from the
current FIX.

5)  What is the TC and Dist to Masabb Dumyat from our last fix of     
     Q1)?
--  -------------------------------------------------------------

On 03/06/96 @ 03-31-25 was out latest FIX. Since then we have been traveling
for 48 Hrs 27 min at an indicated speed of 9.5 Kts on a plotted TC of 106.2d. 
The Current is Drift 0.4, Set 125d.

6)  What is the TCmg and CCmg?
--  --------------------------------

7)  What is our Estimated Position(EP) at this point?
--  --------------------------------------------------

8)  How many miles have we traveled?
    Based on our previous calculations, how many miles remain to
     Masabb Dumyat?
--  ------------------------------------------------------------

9) What is the GMT & Date?
-- -----------------------

Note:
Lat & Lo = XXd XX.X', Date=DD/MM/YY, HE 8 Feet, Index correction -.2', Time
hh-mm-ss in UTC/GMT. Silicon Sea is a medium displacement sailing vessel, 40
Feet LOA. 38 Feet LWL; Cutter rigged. Looks a lot like a Mason. Can tack to
45d. Dist to Horizon: Nmi = SQRT HE@mtrs x 2.07; Nmi = SQRT HE@ft x 1.17.

PLEASE respond with your results and thinking on these exercises to the
NAVIGATION list at large. If you have questions or problems, A lot of folks
on the list are knowledgeable and willing to help. Any questions or doubtful
areas will be responded to promptly. Let us hear from you soon!

Good Navigating!

   -=The Navgation List Working Group=-

        Peter Smith  - psmith@wellspring.us.dg.com
        Ron Legere   - ronald.legere@yale.edu
        Tony Severdia- anthonys@ix.netcom.com
        Dan Hogan    - dhhogan@lightside.com
        Wes Murfin   - cn1907@coastalnet.com (Cartographer)

