NOTE TO NAVIGATION LIST:

This is the resumption of the Silicon Sea cruise, finally. All the
information required to work the problem is presented within the
body. Each problem is self contained and does not require knowledge
of previous legs.

Future legs will be posted at 2-3 week intervals, I HOPE!

The number after the Leg number is a postin date code and not
related to the problem.
*******************************Cut Here*****************************

Sight Reduction and 
Dead-Reckoning problem     Leg 21  190597   Test your knowledge!
----------------------     ------  ------   --------------------

REMBER use all the information available as needed on the questions.

On 05/06/96 at 10:08:38UT our Estimated Position(EP) was 32d 33.4'N
27d 29.0'E, Speed 9.5 Knots. Var 0dW, Dev 4dE. 

Masabb Dumyat is our first landfall on the Egyptian coast on our voyage
toward the Suez Canal.


1)  From our Estimated Position(EP) to Masabb Dumyat(31d 30.1'N
    31d 50'E).

    What is the True Course?
    What is the distance to Masabb Dumyat?
    What is the estimated time in route to the nearest minute?
--  ------------------------------------------------------------

Our Pilot Chart shows Current 0.4, Set 135d. The is wind 270d at
16 knts.

2)  What is our Compass Course to Masabb Dumyatt?
--  ---------------------------------------------

At 19-08-38 we are at DR (32d 13.1'N 28d 43.2'E).

3)  What is the zone time(ZT) of the end of Civil Twlight (ECT) for
    this DR?
    Do we have time for a round of celestial sights?
--  ---------------------------------------------------------------

4)  Our first sight is at 05/06/96 @ 19-40-00, what is this DR position?
--  --------------------------------------------------------------------

We take the following sights:

     GMT             Body            Hs            Zn
    17-40-00        Vega          18d 54.6'       55.4d
    17-47-20        Spica         45d 27.3'       164.3d    
    17-56-15        Regulus       47d 58.9'       250.7d   

5)  Using the time of the first SR what is the plotted FIX?
--  -------------------------------------------------------
 
6)  What was the Speed Made Good and the Compass Course from our
    EP to our FIX?
--  -------------------------------------------------------------

7)  What was the True Course Made Good(TCMG)?
    What was the distance traveled?
--  -----------------------------------------

8)  Would you change your heading at this time?
    Why?
--  -------------------------------------------

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)
