What is an example of an Aids to Navigation?

A lighthouse serves as a quintessential example of an Aid to Navigation. It is specifically designed to assist mariners in safely navigating coastal waters or harbor entrances by marking dangerous coastlines, hazardous shoals, safe entry points, and assisting in aerial navigation. Lighthouses typically emit light signals to indicate their location during both day and night, enabling vessels to determine their position relative to land and other navigational hazards.

Other options, such as a fish market, waterfront restaurant, and marina services, while related to maritime activity, do not fulfill the primary function of aiding navigation for vessels. These establishments provide services and amenities for boaters and fishermen but do not offer navigational guidance or safety information essential for safe marine travel.