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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Sextant with an umbrella
From: Robin Stuart
Date: 2015 Oct 2, 09:42 -0700
From: Robin Stuart
Date: 2015 Oct 2, 09:42 -0700
A nice feature of the Blish prism is that it would act like a corner cube or retro-reflector which exactly reverses the direction of incoming rays regardless of its exact orientation. No very precise alignment of the prism would be needed accurately to measure dip,
Robin Stuart
