Published 2025-Bayesian-InterimReport.pdf 3.18 MB

It started down flooding according to stability book at about 45 degrees AVS keel up was 75 degrees

[image] powerabout: AVS keel up was…. Report says investigation commissioned the keel up (motoring) study. Original SIB all conditiins board down. (same on the Perini I once drove)

stability booklet contains information on board up as it should othewise it can never be raised

From MAIB… “The SIB did not contain such curves for when Bayesian was operating in the motoring condition where the centreboard was raised and no sails were up”

but it did for sailing so far worse a condition. Centreboard got nothing to do with it wind force was going to lay it over well past down flooding angle and hold it there regardless of where the board was

[image] powerabout: it did for sailing… “…Bayesian’s SIB contained curves for the sailing conditions when at maximum load, contractual full load and in the light load condition. In all three of these conditions the centreboard had to be lowered” You made the comment about “AVS keel up”. I …

how did they know that, because they did a stability study with it up. Is the MAIB saying the MCA gov issued a stability booklet for a commercial yacht but didnt know what would happen if the board is raised? [image]

i think they would since the boat wasn’t a racer. there should be a stability curve for different points of sail. you wouldn’t want the keel all the way down if you were going down wind as the extra drag and board length would affect the performance of the vessel IE slowing it down

its a blade and bulb arrangement the lower the bulb the more stability and the righting moment GM in general would stop the angle of heel

Interim report on loss of the yacht Bayesian

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Interim report on loss of the yacht Bayesian

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