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Re: Puzzled by Douglas Protractor Instructions
From: Michael Koblic
Date: 2016 Sep 3, 15:32 -0700
From: Michael Koblic
Date: 2016 Sep 3, 15:32 -0700
I got the same problem having just discovered a very old Douglas protractor in my library. I found the instructions less than helpful. However, I believe the essential step is to actually draw a bearing line on the map and manoeuvre the protractor so it is lined up with the line ("the left edge") and the nearest meridian (or the grid). Another set of semi-helpful instructions is here:
http://www.chamberssailing.org/Documents/Manual%20Douglas%20Protractor.pdf
I am not sure how helpful this book is as it is still downloading :-)
http://tortolasailingschool.com/wpress/wp-content/uploads/2015/04/ym-offshore-course-notes.pdf
