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» Online Classroom   » Inland and Coastal Navigation   » Public Discussion of Inland and Coastal Navigation   » 7-21

Author Topic: 7-21
Michael Mitgang

 - posted March 12, 2005 02:27 PM      Profile for Michael Mitgang           Edit/Delete Post 
Do we not need to know what day we are doing this on as our depth sounder is measuring actual depth not charted depth and therefore to properly navigate we need to know what the tide hights our around these times. If that is not needed, I don't see how being at the lat/lon of 16.5'N, 53.5'W at 110T we could hit the 4 fathom shoal.

Please clarify.


From: Menlo Park, CA
David Burch

 - posted March 12, 2005 09:07 PM      Profile for David Burch           Edit/Delete Post 
That is a very good question, and we should have been more specific. I will add a note in tech support. The key here is the table of depth versus time has presumably been corrected for draft and tide... so you do not need to know the date.

Check your plots again. Note this is a true heading. Seems the answer is right on the check i made.

From: Starpath, Seattle, WA

All times are Pacific  
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