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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Murray Buckman
Date: 2024 Dec 20, 15:07 -0800
Hi Max, you said "I believe that the Ice Exclusion Zone really is determined by the current and predicted future movements of ice."
In general - yes - determined by the ice.
Except that I mentioned the northward movement beneath Australia. Going back to the last Vendee Globe, and still in place for the current race, there was an SAR consideration...
"The position of the ice fields are not the only determinants in positioning the exclusion zone. The Australian Maritime Rescue Coordination Center (MRCC) and the Australian Maritime Safety Authority (AMSA) request four points which mark their safe rescue limit from their centres, of around 1,000 nautical miles. This is agreed between the Australian authorities and the Race Direction in particular following the rescue of injured Yann Eliès in 2008. These four points are located at latitude 46 degrees 00 South and run from 105 to 120 degrees East longitude."
Taken from comments by Jacques Caraës, the Vendée Globe Race Director for the 2020 edition and reported in Sail World at the time.
Speaking of jury rigs, one competitor Pip Hare, a popular favorite - not because of her performance but because of her engaging communication style - is under jury rig after loosing her mast south of Australia.