A lateral buoy , lateral post or lateral sign , as defined by the International Association of Lighthouse Authorities, is a sea mark used in maritime scouting to show the tip channel.
Each sign indicates the edge of a secure channel in terms of port (left) or right (right). This direction is relative to buoyage direction ; This is usually a nominal upstream direction. In the river, buoyage direction towards the river source; at the harbor, buoyage direction to port from the sea. Where there may be doubts, they will be labeled on the appropriate graph. Often the cardinal marking system is used instead, when confusion about directions will be common.
A ship that leads to the buoyage (eg to the port) and wants to stay on the main channel should be:
- save the ports to ports (left), and
- save the asterisk to the right side (right).
Video Lateral mark
IALA System
Signs are distinguished by shape and color, red or green.
Due to historical reasons, two different schemes are used worldwide, differing in the use of their colors. Previously there were 30 different buoyage systems, before IALA rationalized the system. In 1980 at a conference hosted by IALA, they agreed to adopt the rules of a new joint system, which combined two previous systems (A and B) into one system, with two regions (A and B).
IALA defines them as Region A and Region B :
- Region A consists of Europe, Africa and most of Asia and Oceania, and Greenland.
- Region B consists of America (except Greenland), Japan, North Korea and South Korea, Philippines, Taiwan, Hawaii, and Easter Island.
Region A
- port mark red and may have a red red flash of any rhythm except 2 1.
- a green and may have a green green light of every rhythm except 2 1.
Region B
- green port and may have a light green blink of any rhythm except 2 1
- asterisks red and may have a flashing light red of any rhythm except 2 1
Both regions
- the port mark is square or has a flat top
- a conical star (or represent a triangular shape) or has a pointed tip.
The shape is an important feature, because the colors can not be distinguished in some light conditions, or by people with red-green blind. Signs can also carry unique sign letters and numbers; this can be used to identify the sign as one shown in the nautical chart. Likewise, the sign light can be lit in a special order for the same purpose.
When a channel splits, for example a channel to a port smaller than the main stream, then a preferred channel or bifurcation is used. The mark has the same main shape and color as the signature port or starboard for the main channel. In addition, the horizontal tape is the color suitable for smaller channels. For example: region A, straight main channel, river leading to marina to port. Buoys where dividing channels will be red cylinders or cylindrical pillars. Around the center will be a green band. In IALA region B its shape will be the same, but the main color will be green with red ribbon. See the buoy by the island in the diagram above.
In Region A only, the phrase "Is there a red port left?" (Referring to the red color of the enriched wine "port") can be used as mnemonic, indicating that red marks should be stored on the left when "return" to (that is, entering) the port or stream.
In Region B only, the phrase "red right return" can be used as mnemonic, indicating that red marks should be stored to the right when return to ( ie , entering) a port or river.
Maps Lateral mark
See also
- Cardinal
- Hazarded alert
- Safe watermark
- Custom alerts
- Emergency crash buoy
References
External links
- The Transport Canada website, showing a lateral buoy in Region B.
Source of the article : Wikipedia
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