# NavList:

## A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

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Re: Leg 56
From: Joe Shields
Date: 1999 Jul 15, 16:17 EDT

```My problem with these multi-day legs is that I've always worked out
shorter leg DR problems graphically on a chart.  I can now easily
generate charts for anywhere in the world thanks to the chart plotting
software this group has led me to, but the scale isn't large enough to
work out the solution graphically.  Are you using some sort of distance
formula or a table somewhere (or a Nav. calculator) to arrive at the DR
position.  I've only done day-long coastal cruises but I always figured
you would still work out DR positions over a shorter elapsed time, if
for no other reason then that the wind conditions would vary enough to
give different cruising speeds and even headings.
I'm not complaining, mind you, just that I could use some help in
working the long-leg DR problems.  What's the trick?
-- Joe Shields
> ----------
> From:         Millard Kirk[SMTP:mkirk@XXX.XXX]
> Sent:         Wednesday, July 14, 1999 5:12 PM
> Subject:      Leg 56
>
> My first attempt at Leg 56 I notice the typo's and decided to wait
> until Dan
> corrected the typo's. He usually catches those error very quickly and
> he
> did.
>
> Now I start to work the problem.  Answers 1 and 2 correspond with the
> answers given by Dan/
>
> My question to the list is concerning question # 3.   I assumed we
> started
> on 11:50:00 UTC @ 20/03/1999 and traveled to 18:48:23 UTC 23/03/1999
> that
> is  3 days and 6 hrs 58 min 23 sec., or 78 hrs 58 min 23 sec.  That
> means
> our DR should reflect 78 hrs 58 min 23 sec traveling at 10.3 kts on a
> course
> of 124.6  true.  We were buffeted for two days (I don't know what that
> means), but in any case I have trouble coming up with the correct DR
> for
> problem # 3.   Any Help!
>
> Still...............
>
> Learning the Hard Way!!
>
> Millard Kirk KB8YQO       | mailto:mkirk@XXX.XXX
> 116 Lewis Ave                    |
> http://webpages.marshall.edu/~mkirk/
> Barboursville, WV               | A West Virginia Blue Water Sailor
> 25504                                 | Phone: (304) 736-6544
>                                            | First United Methodist
> Church,
> Barboursville, WV
>                                            | Homepage
> http://www.gbgm-umc.org/bfumcwv/
>
```
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