This online article is an advisory summary of different ATON marks. For detailed recommendations refer to IALA Maritime Buoyage System.
Buoyage system has been geographically divided into two regions; A and B. Lateral marks differ between Buoyage Regions A and B, and other five types of marks are common.
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ATON Marks
Lateral marks indicate the edge of a channel. In a river, the direction of buoyage is towards the river's source and in a harbour, the direction of buoyage is into the harbour from the sea. Red and green colors mark the port (left-hand) and starboard (right-hand) sides of channel in Region A, and reversed colors red to starboard and green to port in Region B. Therefore the area between red and green buoy is a safe route for a vessel to navigate. In some regions also bifurcation buoys are used to mark out the preferred channel.
Cardinal marks are different shaped yellow-black sea marks with top-mark. They indicate the direction of safe waterway, cardinal (compass) direction (north, east, south or west) relative to the mark. Cardinal mark can also indicate of a hazard.
Isolated danger mark is black-red colored and placed on or near to a danger. Safe water mark, also called a Fairway buoy is red-white colored and indicates navigable water around it. Special marks are yellow and they indicate a special area for example cables, pipelines, spoil ground, aquaculture or recreation zone. New danger marks are newly discovered hazards and wrecks that may not be shown in nautical documents. They are blue-yellow.
For marking different ATON applications around the world we offer a wide selection of buoy lanterns including both standalone (externally powered) and solar self-contained lanterns.
Self-contained solar lantern M650H on a red buoy.
Other marks are visual ATON signals assisting mariners in the navigation and not necessarily mark channel limits or obstructions.
Sector light ODSL 200 with different colored sectors cover multiple fairways at a same time.
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Lighthouses are towers or substantial structures which show a signal light by night and operate as a significant daymark during daytime. Lighthouse structures can be of any color, shape or material.
Rotating lighthouse beacon VRB-25
combines LED technology with traditional rotating beam.
Sabik Lighthouse Unit SLU modernizes the technology of the traditional lighthouses while preserving the historic heritage and look.
on a fixed beacon in a large commercial port.
Lightvessels act as lighthouses in waters that are unsuitable for fixed constructions.
Auxililiary mark indicating cable lines in Finland.
Sabik all-round LED 160 lanterns as bridge lights.
This online article is an advisory summary of different ATON marks. For detailed regulations refer to IALA Maritime Buoyage System; definitions and descriptions regarding each of the above marks, their color, shape, top mark, numbering, synchronization and light rhythm on full document R1001 IALA Recommendation IALA Maritime Buoyage System downloadable.
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