NavList:

   

Reply

On Aug 25, 2005, at 5:23 PM, Fred Hebard wrote:

> On Aug 25, 2005, at 5:09 PM, Bill wrote:
>
>> Wouldn't a star also have a brief
>> period--relative to its declination/observed altitude--where change in
>> observed altitude appeared to stall while it makes its meridian
>> passage?
>
> Yes.  A principle means of establishing latitude on land, where a plumb
> bob or spirit level can be used to establish one's "horizon."  At sea,
> with only a short time at twilight when both the real horizon and stars
> are visible, tough to find a star undergoing meridian passage (and
> wasting time better spent obtaining a 3-point or 4-point fix).
>
>
>> Now that you mention it, I do recall your post.  I apologize if not
>> remembering it, or including it in my response to T, was perceived as
>> a
>> slight. When I mention the gurus, I do include you on my list.
>
> Without trying to speak for George, I didn't get the impression that he
> felt slighted, rather delighted to once again share his erudition, much
> to our benefit.
>
> Fred
>
>

Oops.  I believe by timing the actual moment of meridian passage,
longitude also can be determined, but I'm getting far out of my depth
here.

   

Reply