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    Silicon Sea II: Leg 46, Planning to Depart Sydney
    From: Dan Hogan
    Date: 1999 Feb 03, 7:42 AM

    All: During our extended layover at Sydney Harbor
    the skipper came into some un-explained money. He
    promptly spent it on a new boat. Silicon Sea II
    is a cutter rigged Van De Stadt 48' boat built in
    Sydney, Australia. Applicable details will be
    found listed in the "NOTE:" section at the bottom
    of each problem page. The on board crew for
    planning purposes will be listed as eight.
    In practical small boat navigation accuracy to
    the nearest minute of
    arc or to one decimal place is MORE than needed.
    Answers are given
    greater detail than this because they are
    generated by computer.
    As usual, this is a navigation excersize, not a
    simulation. Data is
    obtained from USDMA Pilot Charts Pub 107,
    1981,Ed.; Ocean
    Passages for the World, 1973 Ed.; Jimmy Cornell's
    World Cruising
    Routes, 1995 Ed.; National Geographic Atlas of
    the World, Revised
    Sixth Edition, and what data is available within
    the Working Group or
    via the Internet.
    Chart(s): Plotting Sheet, any ATLAS
    Route Planning and
    Dead-Reckoning problem     Leg 46  231999   Test
    your knowledge!
    ----------------------     ------  ------   ------
    Planning Routes--Port Jackson to Boston
     Port Jackson(Sydney) Departure--33d 50.8'S  151d
     Tasman Sea Waypoint 1-----------34d 00.0'S  151d
    Tasman Sea Waypoint 2-----------38d 40.0'S  166d
     Destination N of Stephens Is.---40d 50.0'S  174d
     Wellington Departure Point------41d 30.0'E  175d
     Cape Horn-----------------------56d 04.0'S   67d
    Port Stanley, Falkland Is.------51d 40.0'S   57d
     Mid-Atlantic Waypoint-----------00d 00.0'N   23d
     Barbados------------------------13d 10.0'N   59d
     Cape Cod------------------------58d 00.0'N   70d
     Boston--------------------------42d 20.0'N   70d
    1)  Using our waypoints, what is the TOTAL
    rumbline distance we will
        travel to Boston?
    --  ----------------------------------------------
    2)  At an estimated speed of 8.4 Knots, how many
    days is the total
    --  ----------------------------------------------
    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
    Using these figures for the trip.
    3)  What is the total weight of food provisions for the trip?
    --  ---------------------------------------------------------
    4)  How long will the water tanks supply (See
    NOTE below) last?
    --  ----------------------------------------------
    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
    5)  What is the TC and Dist from our departure
    point(33d 50.8'S
        151d 18.0'E)?
    --  ----------------------------------------------
    6)  What is the Great Circle route and initial
    --  ----------------------------------------------
    Our anticipated departure date is February 17,
    7)  What is the Zone Time(ZT) of sunrise at
    Sydney, Australia
        (33d 50.0'S 151d 20.0'E)?
    --  ----------------------------------------------
    Lat & Lon = XXd XX.X', Date=DD/MM/YY, HE 9 Feet,
    Index correction
    -2.0', Time hh:mm:ss in UTC/GMT unless ZT is
    stated. Silicon Sea II
    is a  34,000 lb(15.40t) displacement sailing
    vessel, 48' 3"(14.70m)
    LOA. 39' (12.00m) LWL; Cutter rigged. Can tack to
    45d. Water
    Tanks = 220 gal (1000 ltrs). Fuel Tanks = 155
    gal(700 ltrs). Fuel
    consumption .675 gal/Hr at 8.5 Kts.
    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 offolks 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 Navigation List Working Group=-
            Peter Smith  - psmith@wellspring.us.dg.com
            Wes Murfin   - wmurfin@onslowonline.net (Cartographer)
            John Simmonds- mobi@netconnect.com.au
            Jim Manzari  - manzari@bluewin.ch
            Dan Hogan    - dhhogan@concentric.net
    Dan Hogan
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