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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 @ 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 @ 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@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 Navigation List Working Group=-

        Peter Smith     - Smith_Peter@EMC.COM
        John Simmonds   - johnsimmo@dingoblue.net.au
        David Weilacher - daveweilacher@earthlink.net
        Tony Cappiello  - cappiello@kearfott.com
        Frank Norris    - NORRIS_FRANKLIN_H@LILLY.COM
        Sam Chan        - schan@socal.rr.com
        Dan Hogan       - dhhogan@veriomail.com


Dan Hogan
dhhogan@verionmail.com

   

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