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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.

****************************Cut
Here*************************************

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
18.0'E
 Tasman Sea Waypoint 1-----------34d 00.0'S  151d
40.0'E
Tasman Sea Waypoint 2-----------38d 40.0'S  166d
45.0'E
 Destination N of Stephens Is.---40d 50.0'S  174d
00.0'E
 Wellington Departure Point------41d 30.0'E  175d
20.0'E
 Cape Horn-----------------------56d 04.0'S   67d
15.0'W
Port Stanley, Falkland Is.------51d 40.0'S   57d
40.0'W
 Mid-Atlantic Waypoint-----------00d 00.0'N   23d
00.0'W
 Barbados------------------------13d 10.0'N   59d
20.0'W
 Cape Cod------------------------58d 00.0'N   70d
00.0'W
 Boston--------------------------42d 20.0'N   70d
46.0'W


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
    trip?
--  ----------------------------------------------
----------------

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?
--  ---------------------------------------------------------

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
Island.

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
course?
--  ----------------------------------------------
----

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)?
--  ----------------------------------------------
------------

Note:
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
dhhogan@concentric.net
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