What material is recommended for lifelines used in diving?

The recommended material for lifelines used in diving is Dacron. Dacron is a brand name for a type of polyester that possesses excellent strength, durability, and resistance to environmental factors such as moisture and UV rays. These properties make it particularly suitable for underwater use, where reliability and strength are paramount.

Dacron’s low stretch characteristics are also vital for maintaining safety during diving operations. It ensures that lifelines remain taut, promoting effective communication and support between divers and surface personnel. Furthermore, Dacron is resistant to mildew and rot, which are common concerns in wet environments.

In contrast, materials such as silk, cotton, and wool do not provide the same level of strength or durability. Silk is not suitable due to its lack of strength when wet and susceptibility to environmental damage. Cotton can absorb water, leading to mildew and degradation over time, which compromises safety. Wool is also not appropriate because it absorbs water and loses its strength, making it unreliable for lifeline applications in diving scenarios.