NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Navigation exercise
From: Peter Fogg
Date: 2008 May 19, 16:46 +1000
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From: Peter Fogg
Date: 2008 May 19, 16:46 +1000
Bill <billyrem> wrote:
It is not my intention to argue Peter's straight line, but rather to issue a
caution regarding how long the slope is flat for practical usage. If you
intend to assume a portion of the plot line is horizontal--either in
back-yard sights (when possible given the double angle) with an artificial
horizon or on the water--first check on the rate of change around LAN for
your location and date. Then decide on how much change is tolerable for
your level of precision.
It is not my intention to argue Peter's straight line, but rather to issue a
caution regarding how long the slope is flat for practical usage. If you
intend to assume a portion of the plot line is horizontal--either in
back-yard sights (when possible given the double angle) with an artificial
horizon or on the water--first check on the rate of change around LAN for
your location and date. Then decide on how much change is tolerable for
your level of precision.
Sounds fair enough, Bill.
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