NavList:

   

Reply

On Oct 16, 2004, at 8:28 AM, Richard Langley wrote:

> For those who might be interested in a simple introduction to
> geomagnetism and
> its relevance to navigation (including GPS), see "Getting Your
> Bearings: The
> Magnetic Compass and GPS"
> . The
> intention
> of the article was to introduce geomagentism and its use in navigation
> to GPS
> industry types and was not intended for expert navigators -- such as
> we have
> on the list.
> -- Richard Langley
>

Richard,

That was a very informative article for this non-expert navigator, not
to mention a reminder of how much I don't know.

I was surprised that a vessel needs to be going 5-10 km/hr to get a GPS
track accurate to better than one degree, and am wondering what the
accuracy of the track is for low speeds, which might easily be
encountered in a sailing vessel; I suppose this information is included
in GPS manuals, but I don't have one.

Thanks,

Fred

   

Reply