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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Measuring Dip in the 18th Century
From: Ken Muldrew
Date: 2014 Jan 1, 12:15 -0700
From: Ken Muldrew
Date: 2014 Jan 1, 12:15 -0700
On 2014-01-01, at 12:03 PM, Brad Morris wrote:
Here is an example of a "quadrant" from the late 1500s.
From the pages provided Wright asserts1) that the solstice altitudes of the sun were observed with a quadrant.
2) that the observations were recorded to 1/2 arc minute
This is much different from the later reflecting quadrant used at sea.
Ken Muldrew.
