Which of the following ropes is best for marine applications due to its water resistance?

Nylon is considered the best option for marine applications primarily due to its significant water resistance and strength. Unlike natural fibers, which can absorb water and become heavy, nylon maintains its strength even when wet. It is also highly resistant to mold, mildew, and rot, making it especially suitable for environments that are continuously exposed to moisture, such as on boats.

Nylon's elasticity adds to its advantages; it can stretch under tension, absorbing shock, which is crucial in dynamic marine situations where loads may vary due to waves or movement. The combination of durability, low stretch, and resistance to the harsh marine environment positions nylon as the ideal choice for ropes in boating and other marine applications.

On the other hand, while Dacron is another option used in marine settings, it is a polyester fiber that does not offer the same level of elasticity or stretch as nylon. Manila and natural fibers are less suited for marine applications primarily because they can degrade when exposed to water over time, leading to a decrease in performance and reliability.