What is a crucial factor for the effectiveness of navigational buoys?

Regular maintenance and visibility are fundamental to the effectiveness of navigational buoys. Maintenance ensures that the buoys remain in good condition, able to withstand marine conditions, and continue to fulfill their purpose without being damaged or becoming inoperative. Visibility is equally critical because the primary function of these buoys is to mark channels, hazards, or safe navigation routes; if they are not easily visible, their utility is greatly diminished.

A buoy that is not well maintained could be less effective or go unnoticed, causing potential hazards for vessels navigating the area. Thus, both regular upkeep and clear visual identification are essential for ensuring that mariners can rely on navigational buoys for safe passage.