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» Online Classroom   »   » Public Discussion of Inland and Coastal Navigation   » Problem 1-16 ( A )

   
Author Topic: Problem 1-16 ( A )
James Muniz


 - posted January 16, 2005 06:17 PM      Profile for James Muniz           Edit/Delete Post 
Is 4.01 n mi the exact answer? I can't seem to come up with that exactly. How do I determine the compass bearing 004.2 T ?, I can't seem to come up with that either.
David Burch


 - posted January 20, 2005 05:10 PM      Profile for David Burch           Edit/Delete Post 
Yes, these should be computed answers. We compute them with our StarPilot program, but you can also do this with the free computers we provide in the online Resources. Go to Library/shareware and freeware/ and then general nav and download NIMA Navigation Computers. From within that product select Mercator sailing computations at the end and enter the two lat/lon positions to get range and bearing between them.

Please let me know if that does not give the same answers.

You can see in the coursebook how to measure these values, see sections 2-9 and 2-10 and figures in chapter 6 as well.

If you will remind me after the seattle boat show, i will put some videos we have made online that show the use of the plotting tools. Thanks for the motivating me to do that. We have had these nice movies for some time. They are part of our Chart Triainer software program.

Note on the last part of your question: we are asking here about true bearings not compass, which is indicated by the T. If you want to convert the true bearings to the compass bearings, that is discussed later in the coursebook... which i will not address here as i am not sure that is the gist of your question.

--david

From: Starpath, Seattle, WA
James Muniz


 - posted January 20, 2005 06:17 PM      Profile for James Muniz           Edit/Delete Post 
I had come up with 4.0073333 mi. using a regular calculator. Thanks for letting me know that more will be covered in the later chapters.
David Burch


 - posted January 21, 2005 12:58 PM      Profile for David Burch           Edit/Delete Post 
thanks for the question. For other's reference, i just note that we do have the fomulas online here for those who want to solve this type of problem with a regular calculator and your own formulas. You do not need a programmed device or software program.
From: Starpath, Seattle, WA


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