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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Neil deGrasse Tyson, nautical heretic?
From: Murray Buckman
Date: 2024 Dec 18, 17:56 -0800
From: Murray Buckman
Date: 2024 Dec 18, 17:56 -0800
Perhaps I am going off at a tangent, but, Frank, your mention of ETOPS reminded me of the current Vendee Globe race (single handed non-stop around the world on very high-speed 60 foot/18.3 meter racing yachts).
The race features an ice exclusion zone well north of Antarctica, below which (or above which if thinking in terms of southern latitude) the boats must not venture. In places the zone moves northwards, not because the ice is expected to be further north, but because of the need to be within some pre-determined acceptable reach of emergency services should a boat/skipper get into strife.
An example of the northward shift is beneath the Great Australian Bight. See below: source - vendeeglobe.org
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