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The International Regulations for Preventing Collisions at Sea 1972, also known as Collision Regulations (COLREGs), are published by the International Maritime Organization (IMO) and set out, among other things, the "rules of the road" or navigation rules to be followed by ships and other vessels at sea to prevent collisions between two or more vessels.
The appropriate lights may also be displayed during the day at times of restricted visibility or other necessary circumstances. [3] Vessels under 7 meters are generally not required to display day shapes even if they are required to display lights at night. [4] A square black flag displayed over the ball may be used as a distress signal. [5]
I have removed this passage from Rule 19 (Restricted visibility): General requirement and application of this rule: when a vessel navigating or under way at sea inside or nearby (within audible range 1 to 2 n.m. of fog signal) an area of fog, heavy rain or other causes of restricted visibility; turn on appropriate navigational lights;
Watercraft navigation lights must permit other vessels to determine the type and relative angle of a vessel, and thus decide if there is a danger of collision. In general, sailing vessels are required to carry a green light that shines from dead ahead to 2 points (22 + 1 ⁄ 2 °) abaft [note 1] the beam on the starboard side (the right side from the perspective of someone on board facing ...
The geomagnetic activity has a Kp index of 5, meaning the northern lights will also be brighter, according to NOAA. "If you are in the right place, these aurora can be quite pleasing to look at ...
The northern lights — light produced when particles from space collide with atoms and molecules in the upper atmosphere centered on Earth’s magnetic pole —are a manifestation of geomagnetic ...
Diagram of cardinal marks as seen during the day, with their light patterns. The lights shown here are configured as "Quick". A cardinal mark is a sea mark (a buoy or other floating or fixed structure) commonly used in maritime pilotage to indicate the position of a hazard and the direction of safe water.
When will the northern lights be visible? The aurora is expected to be bright, active and visible in parts of 17 continental U.S. states on Thursday night, Sept. 12, 2024.