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» Online Classroom   »   » Public Discussion of Inland and Coastal Navigation   » Question 7-3

   
Author Topic: Question 7-3
Michael Mitgang


 - posted March 12, 2005 10:35 AM      Profile for Michael Mitgang           Edit/Delete Post 
Please advise how you get 1.9 and 2.4 miles. The depths at those distances are approximately 20 fathoms not 13.

Please show a picture of how/where you are measuring.

Thanks

From: Menlo Park, CA
David Burch


 - posted March 12, 2005 08:42 PM      Profile for David Burch           Edit/Delete Post 
Below is the picture. It is asking for depths along a magentic bearing of 110 M to the house. The printed answers appear to be correct: 13 f is about 1.9 nmi offshore (sounding to shoreline) and 15 f is about 2.4 nmi offshore.

The point in the exercise is to note we need to take draft and tide height into account when navigating by the depth.

 -

From: Starpath, Seattle, WA


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