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» Online Classroom   » Inland and Coastal Navigation   » Public Discussion of Inland and Coastal Navigation   » David Burch Tricky Terms in Navigation

   
Author Topic: David Burch Tricky Terms in Navigation
TRMeade


 - posted December 14, 2021 12:45 PM      Profile for TRMeade           Edit/Delete Post 
I'm a bit confused by Burch's definition of "Aspect" in his May 20, 2014 section on tricky terms in navigation. He writes that aspect "is measured from 0 to 180 and labelled Red when we are on the port side of the [other] vessel." Doesn't he mean "... measured from 180 to 360 ..."?
David Burch


 - posted December 14, 2021 01:23 PM      Profile for David Burch           Edit/Delete Post 
Does this help?

It is essentially an angle on the bow definition, and this is always 0 to 180. In this case it is their aspect viewed by us, but it is defined as our angle on their bow using red and green to define the sides. It is an important concept for identification of lights at night, based on a radar measure of their true heading.


From: Starpath, Seattle, WA


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