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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]
Small power-driven vessels (under 12 metres (39 ft)) may carry a single all-round white light in place of the two or three white lights carried by larger vessels, they must also carry red and green navigation lights. Vessels under 7 metres (23 ft) with a maximum speed of less than 7 knots (13 km/h; 8.1 mph) are not required to carry navigation ...
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For example, for vessels greater than 50 metres in length, the visibility ranges of lights are 6 miles for masthead lights, 3 miles for sidelights, 3 miles for the sternlight, 3 miles for towing lights and 3 miles for an all round light. [30] Rule 23 – Power-driven Vessels Underway Rule 24 – Towing and Pushing
Motor ship or motor vessel A vessel powered by a non-steam engine, typically diesel. Ship prefix MS or MV Nef A large medieval sailing ship Oil Tanker A large ship designed for the bulk transport of oil or its products. Packet A sailing ship that carried mail, passengers and freight Paddle steamer A steam-propelled, paddle-driven vessel
2. The power harnessed by a sail or sails to propel a vessel. 3. To use sail power to propel a vessel. 4. A trip in a boat or ship, especially a sailboat or sailing ship. 5. In American usage, a tower-like structure on the dorsal (topside) surface of submarines constructed since the mid-20th century.
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The front cover of a List of Lights volume. A list of lights is a publication describing lighthouses and other aids to maritime navigation. Most such lists are published by national hydrographic offices. Some nations, including the United Kingdom and the United States, publish lists that cover the whole world in many volumes. Other nations ...