Marine anchors are devices used to secure a vessel to the seabed, preventing it from drifting due to wind or currents. They work by digging into the seabed or using weight to hold the boat in place. Different types of anchors, such as plow anchors and fluke anchors, are designed for various seabed conditions and vessel sizes. The effectiveness of an anchor depends on its design, weight, and the type of seabed it is used on, such as sand, mud, or rock. Proper anchoring techniques are essential for safety and stability while at sea, ensuring that the vessel remains securely in position.