What are the three main types of underwater lights used during night dives?

The three main types of underwater lights used during night dives are categorized as primary, secondary, and locator lights. Primary lights are designed for general navigation and visibility, allowing divers to see their surroundings. These lights are typically powerful and provide a broad beam, which is crucial for illuminating the dive site effectively.

Secondary lights serve as backups to the primary lights, ensuring that divers still have a source of illumination if their main light fails. These lights are often compact and portable, making them easy to carry. Finally, locator lights are used primarily for signaling and visibility purposes, allowing divers to be seen by boaters or other divers in low-light conditions. This categorization emphasizes the importance of having different types of illumination sources available for safety and effectiveness during night dives.