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    Silicon Sea: Leg 75
    From: Dan Hogan
    Date: 2001 Jun 20, 7:33 AM

    Leg 75
    
    Chart(s): Plotting Sheets
              Ref: http://www.wa6pby.com/nav/pancanal.txt
    
    Arrival and Customs
    Sight reduction            Leg 75  062001   Test your knowledge!
    ----------------------     ------  ------   --------------------
    
    Our last position FIX was (10d 30.0'N 78d 30.0'W) at 10:16:28UT {at} 04/06/2001.
    We are bound for Cristobal, Panama(09d 23.0'N 79d 55.0'W). Our Estimated Time
    of Arrival(ETA) at Cristobal is 16:34:28ZT {at} 04/06/2001.
    
    
    1)  What day of the week of our arrival?
    --  ------------------------------------
    
    On VHF we call the Panama Canal Transit Authority on Channel 16 for
    instructions. We are required to fly the Panamainian Courtesy Flag from the
    Starboard spreader and the quarantine flag from the port spreader.
    
    2)  What color is the quarantine flag?
    --  ----------------------------------
    
    We anchor overnight, since the Panama Canal Authority requires 24 hours
    notice. We are anchored in an area known as the "Flats" until we can approach
    for inspection.
    
    After our approach approval and customs clearance on the next day we begin
    the process of making the preparations for transiting the Panama Canal. The
    mooring fee is $00.50 per foot to each greater foot per night.
    
    3)  What is the mooring fee for Silicon Sea per night?
    --  --------------------------------------------------
    
    We are required to have 4 dock lines 125 feet long with a three foot eye on
    one end. And strong attach points.
    
    4)  Can we make these lines from a 500 foot roll of 3/4' line?
    --  ----------------------------------------------------------
    
    The actual canal transit takes about 12 hours to complete. However,
    completing the Admeasure, getting Cruising Permits, clearing Customs and
    Immigration inspections can take 3 to 14 days for a small boat. It will take
    Silicon Sea until June 14 to complete the transit she is on the Pacific side
    of the Panama Canal.
    
    5) In what direction does the Panama Canal run from the Atlantic Side to
       the Pacific side?
    -- ---------------------------------------------------------------------
    
    While moored and waiting to complete the required inspections before transit.
    The Skipper worked the following two celestial problems.
    
    DR position(09d 24.6'N  79d 56.7'W) on 11/06/2001.
    
      No. 1  UT/GMT         Body        Hs
    
             23:41:30       Arcturus    51d 58.7'
             23:42:10       Procyon     29d 24.3'
             23:43:05       Spica       57d 44.3'
    
    6)  What is the FIX position for SR No. 1?
    --  --------------------------------------
    
    These are the same sights as listed in Q6. But this time all numbers are to
    be ROUNDED to the nearest whole number. If you are using a calculator or
    Computer program round any numbers that are accessible, ie. Lat, Lon, Hs, GHA
    and Dec, to work the sight reduction and plot both FIXes. DO NOT ROUND TIME.
    
             UT/GMT         Body        Hs
    
             23:41:30       Arcturus    51d 59.0'
             23:42:10       Procyon     29d 24.0'
             23:43:05       Spica       57d 44.0'
    
    
    7)  What is the FIX position for SR No. 2?
    --  --------------------------------------
    
    Now compare the two FIXes.
    
    NOTE:
    Lat & Lo = XXd XX.X', Date=DD/MM/YY, HE 9 Feet, Index correction
    -1.5', Time hh:mm:ss in UT,unless otherwise 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. DR(Dead-Reckoning)=position
    by sailings, EP(Estimated Position)=DR+current affect. Dist to
    Horizon: Nmi = SQRT HE{at}mtrs x 2.07; Nmi = SQRT HE{at}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 Navigation List Working Group=-
    
            Peter Smith     - Smith_Peter{at}EMC.COM
            John Simmonds   - johnsimmo{at}dingoblue.net.au
            David Weilacher - daveweilacher---.net
            Tony Cappiello  - cappiello{at}kearfott.com
            Frank Norris    - NORRIS_FRANKLIN_H{at}LILLY.COM
            Sam Chan        - schan{at}socal.rr.com
            Dan Hogan       - dhhogan{at}veriomail.com
    
    
    Dan Hogan
    dhhogan{at}verionmail.com
    

       
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