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    Re: Silicon Sea II: Leg 46, CORRECTION
    From: Mike Wescott
    Date: 1999 Feb 07, 18:49 EST

    > 1)  Using our waypoints, what is the TOTAL rumbline distance we will
    >     travel to Boston?
    > --  -----------------------------------------------------------------
    14112.8 nmi.
    Using WGS 84 for calc of meridional parts:
                           Merid    Delta     Delta   Delta    RL
     Latitude  Longitude   Parts      MPs     Long     Lat    Dist   Course
    --------- ---------- --------- --------- ------- ------- ------- -----
    33 50.8S  151 18.0 E -2147.567
    34 00.0S  151 40.0 E -2158.603   -11.036    22.0    -9.2    20.5 116.6
    38 40.0S  166 45.0 E -2504.864  -346.261   905.0  -280.0   783.6 110.9
    40 50.0S  174 00.0 E -2673.302  -168.439   435.0  -130.0   360.0 111.2
    41 30.0S  175 20.0 E -2726.236   -52.934    80.0   -40.0    72.5 123.5
    56 04.0S   67 15.0 W -4061.940 -1335.704  7045.0  -874.0  4691.9 100.7
    51 40.0S   57 40.0 W -3614.752   447.188   575.0   264.0   430.0  52.1
    00 00.0N   23 00.0 W    -0.000  3614.752  2080.0  3100.0  3576.6  29.9
    13 10.0N   59 20.0 W   791.804   791.804 -2180.0   790.0  2314.1 290.0
    42 10.0N   70 00.0 W  2779.722  1987.918  -640.0  1740.0  1828.0 342.2
    42 20.0N   70 46.0 W  2793.182    13.460   -46.0    10.0    35.6 286.3
                                                             -------
                                                             14112.8
    > 2)  At an estimated speed of 8.4 Knots, how many days is the total
    >     trip?
    > --  --------------------------------------------------------------
    70.0 days
            14112.8/8.4 = 1680.1 hrs
            1680.1/24 = 70.00 days
    > We will have a total of 8 crew when we depart Wellington. We estimate
    > water consumption at 2 gal/day per man (person). Food required is
    > estimated at 1 3/4 lbs/day per man.  Plus 50% in case of a slow
    > passage. And 10 days emergency rations at 3/4 lb per day.  Using these
    > figures for the trip.
    > 3)  What is the total weight of food provisions for the trip?
    > --  ---------------------------------------------------------
    Assumption: "trip" means Wellington to Boston
    Assumption: emergency rations are 3/4 lb per day (as stated)
          and not 3/4 lb per day per person for 10 days
    1351.5 lbs
            Wellington to Boston: 12876.2 nmi (Rhumb Lines)
            12876.2/8.4 = 1532.9 hrs
            1532.9/24 = 63.9 days (use 64).
            1.50 * (8 * 64 * 1.75) + 10 * .75 = 1351.5
    4)  How long will the water tanks supply (See NOTE below) last?
    --  -----------------------------------------------------------
    13.75 days
            220 / (2 * 8) = 13.75
    > We can store an additional supply on deck in containers. We add 110
    > gals of water.
    > Our stop is at Wellington, New Zealand. The arrival waypoint is (40d
    > 50.0'S 174d 00.0'E), just north of Stephens Island.
    > 5) What is the TC and Dist from our departure point(33d 50.8'S
    >    151d 18.0'E)?
    > --  ------------------------------------------------------------
    TC 111.1   Dist 1164.1 (Mercator Sailing)
      Lat        Long      MP      dLat   dLon    dMP    Dist  Course
    --------  --------- --------- ------ ------ ------- ------ ------
    33 50.8S  151 18.0E -2147.567
    40 50.0S  174 00.0E -2673.302 -419.2 1362.0 -525.74 1164.1  111.1
    > 6) What is the Great Circle route and initial course?
    > --  --------------------------------------------------
    TC 117.9   Dist 1157   using law of cosines formulae
    > Our anticipated departure date is February 17, 1999.
    > 7) What is the Zone Time(ZT) of sunrise at Sydney, Australia
    >     (33d 50.0'S 151d 20.0'E)?
    > --  ----------------------------------------------------------
    0531
    >From Almanac 2/17/99 Sunrise:   30S  0541
         Interpolation (from table):       -5
     1d 18.0' (More East = Earlier):       -5
                                         ----
                                         0531
    <PRE>
    --
    	-Mike Wescott
    	 mike.wescott{at}XXX.XXX
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    </PRE>
    

       
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