NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Irv Haworth
Date: 2009 Nov 8, 15:59 -0800
Does
|
The
plot thicken ? |
Dist.
|
from |
11AM/12.00 Is
34.8NM |
Which
=34.8 |
Seems
to indicate positions are in error ? |
||||||
Notes |
date/time |
lat |
lon |
naut.
miles run |
SOA |
wind
from |
knots
|
barom. |
wave
height |
air
temp |
dew
point |
water
temp |
2009-Nov-08
16:00 |
S
44°24' |
E
167°00' |
43 |
10.7 |
220
|
27 |
1016.3 |
1.5 |
12.0 |
10.2 |
13.0 |
|
2009-Nov-08
12:00 |
S
44°24' |
E
166°00' |
35 |
34.8 |
220
|
15 |
1019.3 |
0.5 |
12.0 |
|||
2009-Nov-08
11:00 |
S
44°18' |
E
165°12' |
290 |
15.2 |
250
|
21 |
1022.2 |
13.0 |
12.7 |
13.0 |
Please excuse my lead-in…it now appears the algorithm
used must automatically calc. SOA based on Rhumb dist. In this case dist is
34.8 (my RL calc) and not 35 NM as NM Run.
What I am trying to determine : are data generated/reported
automatically from a GPS without any inputs from navigator, as well as SOA
issue.
( I have been following the track of a large cruise ship
across S. Pacific and now wondering what or who does what…with
confidence. Reminds me of a quip in poor taste “if you drive then drink
and face the traffic with confidence”).
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