What is the purpose of frapping lines during lifeboat lowering?

Fraping lines serve a crucial function during the lowering of a lifeboat by minimizing the swinging motion that can occur as the boat descends. When a lifeboat is being lowered into the water from a ship, it can be affected by various factors such as wind, waves, and the motion of the vessel itself. These conditions can cause the lifeboat to swing or sway, which poses risks not only to the lifeboat structure but also to the crew and passengers within, as well as the overall stability of the lowering operation.

By using frapping lines—ropes that are secured to the lifeboat and then tied off on the ship’s structure—the lifeboat is kept more stable and controlled throughout the lowering process. This prevents excessive lateral movement and ensures that the lifeboat reaches the water with minimal risk of damage or accidents, leading to a safer and more efficient launch. Reducing swinging is critical for safely positioning the lifeboat within the desired area, enabling quick and effective deployment in emergency situations.