帆船有许多种不同类型的固定龙骨，例如全龙骨(见上图)及鳍板。
Sailboats have many different types of fixed keels, such as full keels (see photo) and fin keels.
控制鳍板的一种装置，如回转仪，用于防止轮船在深海中过于摇晃。
Nautical A device, such as a gyroscopically controlled fin, that prevents excessive rolling of a ship in heavy seas.
因为长板在冲到沙滩上时板上没有重量和压力来造成鳍的损坏。
But no damage is done if the fin strikes the sand sans-rider - there isn't enough weight to force a break.
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