Which line is referred to as the forward spring line?

The forward spring line is a specific mooring line that plays a crucial role in controlling a vessel's movement along the dock. This line is typically led from the forward section of the vessel to a point on the dock that is located forward of the vessel's stern, forming a diagonal angle. Its purpose is to prevent the vessel from moving backward while also allowing for some lateral movement if necessary.

In the context of the figures referenced, Figure C (4) is the representation that accurately depicts this configuration of the forward spring line. It shows the spring line oriented correctly to fulfill its function of keeping the vessel securely positioned while managing its movement in relation to the dock.

Other figures might represent different types of lines, such as head or after spring lines, but it is Figure C (4) that particularly illustrates the forward spring line's intended setup and use in mooring scenarios. Understanding the positioning and role of spring lines is essential for effective docking and undocking maneuvers, helping to ensure the safety and stability of the vessel during these operations.