NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Twilight computer
From: Dave Walden
Date: 2009 May 29, 13:51 -0700
From: Dave Walden
Date: 2009 May 29, 13:51 -0700
Try google patent for this twilight computer: Patent number: 2633295 Problem is in northern latitudes it is possible that a whole flight may be in twilight, when neither sun nor stars can be observed. Good to plan around this. I've been looking for one of these. Anyone got one? --~--~---------~--~----~------------~-------~--~----~ Navigation List archive: www.fer3.com/arc To post, email NavList@fer3.com To , email NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---