A single-point mooring (SPM) is a type of anchoring system used primarily for large vessels, such as oil tankers and bulk carriers. It allows a ship to be moored at a single point while being able to rotate freely with the wind and currents. This flexibility helps to reduce stress on the vessel and the mooring system. SPMs typically consist of a buoy connected to the seabed by a chain or cable. They are often used in offshore locations where traditional docking facilities are not available. This system is crucial for the safe loading and unloading of cargo, especially in deep water environments.