NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Silicon Sea: Leg85 ANSWERS
From: Dan Hogan
Date: 2002 Oct 23, 06:02 -0700
From: Dan Hogan
Date: 2002 Oct 23, 06:02 -0700
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@earthlink.net Nav-L Page: http://www.wa6pby.com
