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» Online Classroom   »   » Public Discussion of Cel Nav   » Excercise 2.4 Sextant Reading

Author Topic: Excercise 2.4 Sextant Reading

 - posted November 22, 2009 07:51 AM      Profile for drkimball           Edit/Delete Post 
I'm looking at 2.4 #7 It looks like the IC is .2 on. The answer says .4 on. I am seeing the dot arrow and it isn't near center. What am I missing?
David Burch

 - posted November 22, 2009 10:03 AM      Profile for David Burch           Edit/Delete Post 
The steps of the tics are in 0.2' as below.


Note that most sextants do not have these tic marks labeled (we have added these shown here) so this is always one of the first things we need to check when using a new sextant. Some are in seconds of arc, so in tenths of a minute, some are in two tenths of a minute. The latter may be overall the most common.

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