The frequency with which longlines need replacing depends on several factors: Material Quality: Longlines made from high-quality materials, such as UHMWPE (Ultra-High-Molecular-Weight Polyethylene), tend to have longer lifespans than those made from inferior materials. Usage Intensity: Lines used frequently or in extreme conditions (e.g., icy waters, areas with many underwater obstructions) might wear out faster than those used less often or in more benign environments. Maintenance: Regularly checked and well-maintained lines, where minor damages are repaired promptly, will have an extended lifespan. Environmental Conditions: Factors like UV exposure, saltwater, and temperature fluctuations can influence the degradation rate of the lines. Encounters with Large Fish or Predators: Lines subjected to the strain of catching large fish or being attacked by predators (like sharks) might need more frequent replacement.