Which factor must be considered about frapping lines during lifeboat launch?

The correct answer highlights the importance of how frapping lines are utilized during a lifeboat launch, specifically regarding their correct positioning. Fraping lines are essential for securing the lifeboat in an upright position as it is being lowered. When it is indicated that they must be passed around the falls, it emphasizes that this practice ensures the lines are effectively utilized to control the movement of the lifeboat. This control is critical to prevent the lifeboat from spinning or becoming misaligned as it descends into the water, which could lead to dangerous situations for those on board and those assisting with the launch.

Passing frapping lines around the falls not only secures the lifeboat during the launch but also provides a mechanism for adjusting and stabilizing it as it enters the water. Proper handling of the frapping lines contributes significantly to the safety and efficiency of the lifeboat operation, making this consideration essential during a lifeboat launch scenario.

Considering the specific function of frapping lines within this context shows why understanding their correct application is vital for effective lifeboat operations.