06/01/2026
In sailing, we rely on a lot of Simple Machines that illustrate mechanical advantage.
Some Simple Machines on a boat: vang, mainsheet, halyard.
For example, sailors rely on pulleys (blocks) in a purchase system to make heavy lifting and line-tensioning more manageable with human muscle. A group of blocks linked together with ropes, like a block and tackle, allows a single person to lift heavy mainsails or pull taut lines under enormous wind loads, which turns a difficult physical task into a manageable task.
📷️ https://explorer-mag.nationalgeographic.org/adventurer_april_2019/pulleys_on_the_move_and_trade-offs