Originally Posted by sailingdog
The main reason I prefer a boom brake over a preventer is simple....a preventer allows the boom to load up a lot more significantly, and if it is released, can cause major damage or injury due to the stored energy in the preventer line. It can also cause a boat to be "pinned" by the mainsail in an accidental/unintentional gybe, knocking the boat down and leaving it there until the line is cut or released. Boom brakes allow the mainsail to still move, but reduce its speed to one that eliminates most chance of injury from the boom crossing over the boat. A boom brake doesn't allow the boom and mainsail to store up great amounts of energy, like the preventer can. A boom brake also isn't as likely to allow a situation where gear is damaged or the boom is broken.
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