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» Online Classroom   »   » Public Discussion of Inland and Coastal Navigation   » Question IN05-0007

   
Author Topic: Question IN05-0007
OLowry


 - posted July 11, 2007 10:53 AM      Profile for OLowry           Edit/Delete Post 
IN05-0007: I look this over and feel I'm missing Speed of boat. You gave a time and dirction but no speed or distance. Is something missing or am I not using the right formula (DR, Speed, distance, and time)?
From: Indianapolis, IN
David Burch


 - posted July 11, 2007 01:40 PM      Profile for David Burch           Edit/Delete Post 
the problem is one of translating a logbook record to the chart. this could be done with speed and time entries, so you figure distance on each leg, but in this problem a log (essentially an odometer, see glossary) was used so you have the actual number of miles on each leg, and do not need the speeds or times for that matter.

Generally log records are more accurate than speed and time since the speed varies over any one leg.

From: Starpath, Seattle, WA
OLowry


 - posted July 11, 2007 03:41 PM      Profile for OLowry           Edit/Delete Post 
I can not find a referance to "odometer" in either paper or electronic versions of the glossary under log or odometer. I also did a search on you website and came up blank.
From: Indianapolis, IN
David Burch


 - posted July 11, 2007 03:55 PM      Profile for David Burch           Edit/Delete Post 
Sorry. the wording was poor. I meant to say see "Log" in the glossary, and also to add that the analogy for cars is the odometer, but the sentence was not clear. Writing in too big a hurry.

also if you have the electronic version of our course materails, you can search on (blank)log(blank) and find all of the discussion throughout the course on the topic. you need the blank spaces since "log" is part of many words.... do the search and find all option.

From: Starpath, Seattle, WA


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