NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: I knew where we were, but where are we now?
From: Peter Fogg
Date: 2006 Jun 27, 09:59 +1000
From: Peter Fogg
Date: 2006 Jun 27, 09:59 +1000
> Guy proposed: > > | 38 deg 45 min N > | 122 deg 08 min W > | traveling 50 Nm > | course 045 ( for the change in Lat & long) > | I was able to get the correct lat @ > | 39 deg 20.4 min > | but could not get the Long to agree > | Computer 121 22.7 > | I think I was getting 121 3.8? And George answered: > So the new long is 121 deg 22.6' Using M. Parts and M. Distances I get: N39d 20.4' W121d 22.6' but of course this example is over much too short a distance to show meaningful discrepancy. At least the extra work has not revealed a less accurate result! Phew! It also shows, if Guy was using Mid-Lat, that it is quite adequate over short distances.
