lights on deck

"Brighten Up: Lights On Deck - Illuminating Your Outdoor Space"

By Brian JonesApril 19, 2026

In the realm of marine navigation, the term "lights on deck" is not just a casual phrase, but a critical aspect of safety and communication. This article delves into the significance, types, and maintenance of lights on deck, ensuring you're well-informed about this crucial maritime topic.

Understanding Lights on Deck

Lights on deck serve two primary purposes: ensuring the safety of the vessel and its crew, and facilitating communication with other vessels. They are designed to make the vessel visible and readable to other navigators, especially in low visibility conditions like fog, darkness, or heavy rain.

International Regulations for Preventing Collisions at Sea (COLREGs)

COLREGs, an internationally recognized set of rules, govern the use of lights on deck. These rules dictate the number, placement, and color of lights based on the vessel's size and type. Compliance with these regulations is not just a maritime best practice but a legal requirement.

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Mandatory Lights

COLREGs mandate specific lights for different vessels. For instance, power-driven vessels over 50 meters in length must exhibit:

Two all-round red lights at the port and starboard sides.
One all-round green light at the starboard side.
One all-round white light at the stern.

Types of Lights on Deck

Lights on deck can be categorized based on their function and placement:

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Side Lights

Side lights, also known as sidelights, are exhibited on the port and starboard sides of a vessel. They indicate the vessel's direction of movement. Red lights are exhibited on the port side, while green lights are exhibited on the starboard side.

Stern Light

The stern light is exhibited at the vessel's stern (rear) and indicates the vessel's direction of movement. It is white in color and is exhibited in addition to the side lights.

Masthead Light

A masthead light is exhibited at the highest point of the vessel and indicates the vessel's presence. It is white in color and is used in conjunction with other lights to indicate the vessel's direction of movement.

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Maintenance of Lights on Deck

Regular maintenance of lights on deck is crucial for their effectiveness and longevity. This includes:

Regular cleaning to remove salt, dirt, or other debris that can obstruct light.
Checking bulbs and batteries to ensure they are in working order.
Inspecting wiring and connections for any signs of damage or corrosion.

It's also important to carry spare bulbs and batteries, as well as a backup lighting system, in case of emergencies.

Conclusion

Lights on deck play a pivotal role in maritime safety and communication. Understanding their types, functions, and maintenance requirements is essential for all mariners. By adhering to international regulations and practicing regular maintenance, we can ensure the safety of our vessels and crew.