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Subject: Leg 55 results
From: Paul Hirose (71202.2014@XXX.XXX)
Date: Sun Jun 20 1999 - 13:15:42 EDT
Here are partial results from Leg 55:
1. Mar 16 2101Z DR = 47 20 S 122 52 W
2. To 52 30 S 100 00 W, TC = 109, dist = 930 nm
3. Compass course = 82, speed made good (not asked) 10.8
4. Mar 17 0520Z fix, all over the ocean. My 0520 DR is 47 42 S 121
20 W. I reduced all 5 sights, and the LOPs are everywhere! Some of
the intercepts are more than 2 deg.
Conditions here are not the best. Since I don't have the 1999
Almanac, I'm following the instructions for using last year's edition
(deduct 15.1' from GHA Aries). Also, I don't have an HO 229 for this
latitude, so I'm using the reduction tables in the Almanac. Between
being rusty and using unfamiliar procedures, probably have made some
blunders.
body time GHA aLon LHA dec Hc Zn
Betelgeuse 02:50:00 127 58 120 58 7 N 7 24 34 16 351
Procyon 02:51:10 102 13 121 13 341 N 5 14 34 14 23
Peacock 02:51:24 270 43 121 43 149 S56 44 17 52 197
Regulus 02:52:22 65 15 121 15 304 N11 58 12 15 56
Bellatrix 02:53:11 136 16 121 16 15 N 6 21 34 04 342
All plotting was done on sheets of typing paper. DR computations by
E6-B air navigation slide rule. Sight reduction by paper and pencil.
By the way, keeping up with Silicon Sea with traditional methods is
pretty time-consuming, which is the main reason I don't always
participate. I've noticed everyone else seems to use computers.
I may go back to HO 211 for reductions. The thing I like about 211 is
that you don't have to contrive an "assumed position" which is miles
from your DR, and different for each sight. You simply use your DR
for the AP. The computation is more involved than HO 229 or the NAO
tables, but you get some time back from the simplified plotting.
Plus, as soon as you compute the intercept you get instant feedback on
the agreement between the LOP and your DR.
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