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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Chronometer dials: 12 or 24 hours?
From: Paul Hirose
Date: 2009 Jan 18, 14:45 -0800
From: Paul Hirose
Date: 2009 Jan 18, 14:45 -0800
Chauvenet (1863) said chronometers should have 24 hour dials, because the AM/PM ambiguity of a 12 hour dial made it more difficult to read the correct Greenwich time. See the footnote on this page: http://books.google.com/books?id=6JlzJHd15vQC&pg=PA56&output=html So I got on the web to see if later ones had 24 hour dials. After looking some pictures at this site, I guess that wasn't the case, at least for the common American chronometers: http://www.chronometer.net/ Why not? Chauvenet's point seems logical to me. -- I block messages that contain attachments or HTML. --~--~---------~--~----~------------~-------~--~----~ Navigation List archive: www.fer3.com/arc To post, email NavList@fer3.com To , email NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---
