Question 1758 Deck General

The correct answer is D) Sunlight. Sunlight is the factor most likely to impair the strength and durability of synthetic line. Ultraviolet (UV) radiation from sunlight can degrade the molecular structure of synthetic fibers like nylon or polyester, causing them to become weaker and more susceptible to breakage over time. This is in contrast to factors like washing with mild soap (A), mildew (B), or dry rot (C), which are less damaging to the integrity of synthetic lines. Proper storage out of direct sunlight is essential for maintaining the strength and lifespan of synthetic ropes and lines used in Coast Guard operations and other maritime applications.