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Re: Tides by bearing of the moon
From: Wolfgang K�berer
Date: 2009 Apr 7, 08:04 +0200
From: Wolfgang K�berer
Date: 2009 Apr 7, 08:04 +0200
This is the oldest method of determining the time of High (and Low) Tide; it was in use at least since the 15th century. One can find descriptions in the "Quatri Partitu" of Alonso de Chaves (ca. 1545) and in English in two versions of Chaucer's treatise on the astrolabe (which may be later additions), not to forget the French booklets by Guillaume Brouscon. A table giving the moon's bearings for the main ports at high and low tide was included in practically every textbook on navigation well into the 19th century. If you want to read more about it, see: Howse, Some Early Tidal Diagrams, in: Mariner's Mirror, Vol. 79 (1993), 27 - 43. The booklets by Brouscon are dealt with by Dujardin - Troadec, Les Cartographes Bretons du Conquet. La Navigation en Images 1543 - 1650, Brest 1966. Regards, Wolfgang --~--~---------~--~----~------------~-------~--~----~ Navigation List archive: www.fer3.com/arc To post, email NavList@fer3.com To , email NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---
