What is an effective way to rig frapping lines when lowering lifeboats in rough seas?

Rigging frapping lines effectively is crucial for maintaining control of a lifeboat during lowering operations in rough seas. The purpose of frapping lines is to secure the lifeboat alongside the ship and to prevent the boat from swinging excessively or being caught by waves, which can compromise safety.

Choosing a lead of about 45 degrees to the lifeboat optimizes the tension and directionality of the frapping lines. This angle allows for sufficient lateral support while still enabling some vertical movement, accommodating the natural rolling and pitching of the ship as well as the lifeboat. The angle creates a balance that reduces the chances of the lifeboat swaying excessively, which can occur in rough seas, ultimately ensuring a smoother and safer lowering process.

In contrast, vertical leads to the lifeboat may cause the boat to swing more freely and can increase the likelihood of it being pushed by waves, leading to potential hazards. A parallel lead does not provide the lateral support needed to counteract the movements caused by rough seas. Leading the frapping lines perpendicular to the lifeboat could also lead to instability, as it would not provide enough control in the direction where the boat might want to swing.

Thus, leading the frapping lines at approximately a