NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: correct way to draw LOPs
From: Rick Emerson
Date: 1999 Jun 22, 09:36 EDT
From: Rick Emerson
Date: 1999 Jun 22, 09:36 EDT
Russell Sher writes: > Thanks for the advice - I had always assumed an arrowhead at each end (and > double for advanced LOP) - by the way what do you mean by 'An LOP is > perpendicular to the bearing' ... ? Are you assuming a celestial LOP here > (perpendicular to the azimuth?) In the case of (say) a bearing of a known > shore object, for coastal nav. this would of course not be the case - > right?, do you still use an arrowhead at each end in this case - with the > LOP drawn through the object for a short distance? [...] As I said to Russell, my comment was a case of my fingers being faster than my brain. Range-based LOP's are perpendicular while bearing-based LOP's indeed lie on the bearing line (i.e., are not perpendicular). As to the question of arrows, they're not used in the most recent Bowditch. I was introduced to using arrows on an Ocean Star trip. I find arrows helpful in clarifying which LOP's are original and which are advanced. Rick S/V One With The Wind, Baba 35
