Fishing, Electronics, Boating
There are various types of blocks that are used in sailing. Some blocks are used to increase mechanical advantage and others are used simply to change the direction of a line. Some blocks ratchet, which means that they turn freely when a line is pulled in one direction but does not turn the other direction. This kind of block makes a line easier to hold, especially on a windy day. They usually have a button or lever to turn the rachet off, turning it into a regular block, allowing lines entering the block move freely in both directions. Ratchet blocks are typically used on small keelboats and dinghies where the mainsheet is and jib sheets are located.
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