USCG Aids to Navigation Practice Exam

Range lights are structured navigational aids used primarily to assist mariners in safely maintaining a course along designated channels or safe navigational routes. When two range lights are aligned, they create a visual reference point for the navigator, indicating that they are on the correct bearing to continue their journey safely. This alignment helps prevent vessels from straying into dangerous waters, ensuring the safety of all types of maritime traffic, not just specific categories like fishing vessels or commercial ships.

The primary purpose of range lights is to support the safe navigation of all vessels, including commercial, recreational, and fishing boats, by providing a clear and effective means of navigation. Therefore, saying that range lights help guide mariners along a safe course encompasses the overall intent and function of these aids to navigation. This broad application highlights their importance in maritime safety and navigation for various types of vessels rather than limiting their use to specific groups.