In sailing, a line is any rope or cordage used to manage sails, rigging, or equipment, specifically referred to by its function rather than as a "rope." Lines are generally divided into running rigging (lines that move) and standing rigging (stationary lines).

Key Materials and Properties
Polyester: Commonly used for cruising; durable, affordable, and resistant to UV damage.

Dyneema/Spectra: High-performance, low-stretch, and high-strength materials often used for racing or larger boats.

Blended/Double Braid: A polyester cover with a high-tech core (like Dyneema or Vectran) provides a balance of strength and lower cost.

Utility Lines Dock Lines (or Warps): Used to secure the boat to a pier, jetty, or another vessel.

Painter: A line attached to the bow of a small boat (like a dinghy) for towing or tying it off.

Topping Lift: Supports the weight of the boom when the mainsail is lowered.

Key Considerations: When replacing lines, it is crucial to match the existing diameter to ensure they work properly with the boat's clutches and sheaves.