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when must navigation lights be displayed ?

**When Must Navigation Lights Be Displayed?**

Navigation lights are crucial for ensuring safety on the water and in the air. Understanding when and how to use them can prevent collisions and ensure visibility. Here’s a comprehensive guide to when and why navigation lights must be displayed.

### 1. **Marine Navigation Lights: When to Display**

** Sunset to Sunrise: ** Navigation lights must be displayed from sunset to sunrise, regardless of the moon’s brightness. This ensures that boats are visible to others, even in well-lit conditions.

** Restricted Visibility: ** During periods of reduced visibility, such as fog, rain, or mist, navigation lights are essential. They help other vessels determine your position and direction.

** Types of Lights: ** The type of lights required depends on the boat’s size and type:
– **Sidelights:** Show red and green lights to indicate the boat’s direction.
– **Stern Light:** A white light at the stern.
– **Masthead Light:** A white light at the top of the mast, visible from afar.
– **All-Round Light:** A yellow light for boats at anchor.

** Visibility Distances: ** Smaller crafts need lights visible from at least one mile, while larger vessels require lights visible up to three miles.

### 2. **Aviation Navigation Lights: When to Display**

** Sunset to Sunrise: ** Aircraft must have position lights on during these times, both on the ground and in the air.

** Restricted Visibility: ** Lights should also be on in poor weather conditions, even during daylight.

** Seaplanes: ** When operating on water, seaplanes follow maritime rules for navigation lights.

### 3. **Common Misconceptions**

– **Moonlight Doesn’t Replace Lights:** Even under a full moon, navigation lights are necessary to ensure visibility.
– **Daytime Use:** In poor weather, lights help other craft see you, even during daylight.

### 4. **Conclusion**

Navigation lights are vital for safety, whether on the water or in the air. They help prevent collisions and communicate a vessel’s position and direction. Always follow regulations to ensure safety and compliance.

By understanding when and how to use navigation lights, you can contribute to a safer environment for everyone.