What is a hydrovane?

A hydrovane is a type of passive wind vane system used primarily for steering sailing vessels. It consists of a blade that is mounted on a pivot and aligns itself with the wind, automatically adjusting the rudder to maintain the desired course. This system is particularly beneficial for long-distance sailing, as it allows for hands-free steering, improving efficiency and reducing the need for constant attention from the crew. Hydrovane systems are favored for their reliability and simplicity, making them a popular choice among cruising sailors.