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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Longitude by Sunrise example
From: Marcel Tschudin
Date: 2010 Feb 5, 22:10 +0200
From: Marcel Tschudin
Date: 2010 Feb 5, 22:10 +0200
Spring time is prone to ducting phenomena by inversions from warm air over the sea which is still cold from winter. I noticed that in these situations the sun is also much brighter than usual but I don't know the reason for this. Normally I notice those ducts from a longish blotch of light at the apparent horizon (in some cases being rectangular). This light blotch remains then for a while and delays the last glimpse. In some cases I realise only later, from looking at the photos, that there was some ducting involved. I'm interested to hear your experiences. Marcel