AT NIGHT!
30 minutes prior to sundown and thirty minutes after sunup
The white navigation light located at the stern of a vessel is called the "stern light." It is part of a boat's navigation lighting system and is typically required to be illuminated when the vessel is underway at night or during periods of reduced visibility. The stern light helps other vessels determine the direction and orientation of the craft.
A green light on a boat at night indicates the starboard (right) side of the vessel. According to the navigation rules, vessels are required to display different colored sidelights to help identify their direction and status. The green light is visible from a distance and helps other boats determine the course and orientation of the vessel, aiding in safe navigation and collision avoidance.
On a powerboat, the white navigation light is typically located at the stern, or rear, of the vessel. This light is positioned so that it is visible from behind the boat, ensuring that other vessels can detect its presence when approaching from the rear. It is part of the required navigation lights for nighttime operation, helping to indicate the boat's position and direction.
The navigation lights required on a vessel are determined by its size, type, and the conditions under which it operates, as outlined in the International Regulations for Preventing Collisions at Sea (COLREGs). Vessels are classified into categories such as power-driven, sailing, and fishing vessels, each with specific light configurations. Additionally, the operational context, such as whether the vessel is at anchor or underway, also influences the required lighting. Compliance with these regulations ensures safety and visibility on the water.
The phrase "red-light returning" on a boat typically refers to a navigation indication that signals the vessel is returning to port or a safe harbor. It may also imply that the boat is approaching a channel or an area where caution is required, as indicated by red navigation lights. In maritime navigation, red lights generally signify that the vessel should be on the port side, guiding the way for safe passage.
Checking with the authorities in charge of the waters in which you will operate your vessel is ALWAYS advisable.
You are the stand-on vessel but should take precautions in case the other operator doesn't see you.
Stop or Give way
A visible white light on another vessel in darkness typically indicates that the vessel is either at anchor or is a power-driven vessel underway. In the context of maritime navigation, a white light can signify the stern of a vessel when it is moving away from you. It's essential for mariners to understand the configuration and visibility of navigation lights to determine the type and status of nearby vessels. Always maintain a safe distance and be prepared to take evasive action if necessary.
Red
Green
A commercial vessel towing at night displays a white towing light above the stern of the towing vessel and a second white light at the stern of the tow. Additionally, the vessel should show a green light on the starboard side and a red light on the port side, as well as an all-round white light at the stern of the vessel being towed. These lights help indicate the vessel's activity and ensure safe navigation for other vessels.