Bow Spring
A mooring line that runs diagonally from the bow of a vessel to a fixed point on a dock, used to control forward and backward movement while berthed.
A bow spring is an essential mooring line used in securing a vessel to a dock or quay. Unlike standard bow lines, which are typically fastened perpendicular to the vessel, a bow spring is rigged at an angle, running diagonally from the bow to a cleat or bollard further along the dock. Its primary function is to prevent the vessel from surging forward or aft due to external forces such as wind, currents, or the wake of passing vessels. By counteracting these forces, the bow spring helps maintain the vessel’s position relative to the dock, ensuring stability and safety during berthing operations.
When used in conjunction with other mooring lines, such as stern springs, breast lines, and head or stern lines, the bow spring contributes to a comprehensive mooring arrangement. This setup ensures the vessel is securely held in place, reducing the risk of damage to both the vessel and the dock. The tension in the bow spring is carefully adjusted to balance the forces acting on the vessel, often in coordination with other lines to distribute the load evenly. Proper use of a bow spring is particularly important in tidal areas or busy harbours, where dynamic forces can be more pronounced. Understanding the role and correct deployment of a bow spring is a fundamental skill for any mariner involved in docking or mooring operations.
