[Boatanchors] Radio Ranges/Nautical Mile/Navigation

[Dave Roscoe]

Got ur seconds and minutes mixed up , Bill.

I wud not want u standing NAV watch on my ship !


73  de Dave W1DWZ



----- Original Message ----- 
From: "Bill Pileggi" <wpileggi at juno.com>
To: <boatanchors at mailman.qth.net>
Sent: Saturday, June 18, 2005 12:00 AM
Subject: [Boatanchors] Radio Ranges/Nautical Mile/Navigation


>
> I hope this isn't too far off on that "how much is a nautical mile
thread", and may pose a neat question at the end.
>
> A nautical mile, by definition and agreement, is 1852 meters. 1852 meters
is equal to 1 second (of arc). 60 seconds is equal to 1 degree (can you see
where this is going?). 360 degrees equals a 'great circle' path around the
earth, or a line of longitude. Do the math, starting with 1852 meters and
you end up with the approximate circumference of the Earth.
>
> Which leads us to a cool question I first posed to my 10 year old niece*:
We know how long an hour is - How FAR is an hour?  [Adults with a sea-faring
background get it, and yet so many others don't. The EXACT answer is quite
simply stated.] (*My brother-in-law is a GPS manager at a major defense
contractor, and I'm still teaching him :-) Bill KA3AIS
>
>
>
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