|
|
|
|
|||||
|
||||||
Subject: Re: Silicon Sea: Leg85 ANSWERS
From: Dan Hogan (dhhogan1@XXX.XXX)
Date: Wed Oct 23 2002 - 09:02:38 EDT
On 23 Oct 2002, at 13:43, Peter Fogg wrote:
> Q1) Total distance 3222 nm
OK
>
> Q2) 13.4 days
OK
>
> Q3) Need 100+ gal, carry 220 gal, so YES
OK
>
> Q4) TC 12.3d
OK
>
> Q5) Also time of sun's meridian passage, 12 noon LAT
OK
>
> Q6) Still 12.3d ( calculated 12.25d)
OK
>
> Q7) TC to steer 011.8d, less combined error 11.5 leaves
> CC to steer 000.3d
OK
>
> However as accuracy by plotting is only to nearest degree
> a CC to steer 000d is more practical. I guess that there must
> be a way to calculate these questions by trigometric means.
Which is why after about the thrid day out, I usually end up navigating to
the nearest whole minute, then a week after that, only noon sights until
about one or two days from ETA.
Dan Hogan WA6PBY
C27 "Gacha"
dhhogan1@XXX.XXX
Nav-L Page: http://www.wa6pby.com
|