A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: David Pike
Date: 2020 Jul 14, 11:29 -0700
Frank Reed You wrote: You mentioned "neaps". Neap tides around the North Sea occur a couple of days after First Quarter and Last Quarter. The offset is different in other parts of the world. A delay of one day is typical, which means that most locations had their neap-iest neap tides yesterday. When talking about the Moon's phase, it's safer to stick with the actual phase, or the elongation angle (the Moon-Sun lunar distance).
I suppose I should have said third quarter. We got up early on Saturday 11th to drive to TIKI. The sky was clear, and the Moon was almost semi-circular, so I knew the Moon couldn’t be full by 14th. Looking at my tide tables, I see it was 3rd quarter on Sunday 12th. I ought to have hung on an hour until the Sun appeared and tried to shoot an elusive Sun, Moon, Venus, but I was anxious to get to Brough in time to get in a couple of hours on the top of the tide. I had everything set up for the fix on Monday morning, but of course there was too much cloud. One day I’ll catch it. DaveP