INTERNATIONAL ASSOCIATION OF MARINE AIDS TO NAVIGATION AND LIGHTHOUSE AUTHORITIES.
In 1975 there were more than 30 different buoyage systems in use all over the world. The development of the uniform system was a very important thing for example imagine that what would happen if more than one system was in use around the world different systems means different rules in complete conflict with one another it would cause confusion and lead to accidents.
Finally it was decided by IALA that there will be 2 regions –
Region A and Region B
Reason A includes Europe, Australia, New Zealand, Africa, the gulf and some more Asian countries.
Reason B comparises of North America, South America, Central America Japan, Korea, and the Philippines.
IALA buoyage system provides six types of marks:
• Lateral marks
• Cardinal marks
• Isolated danger Marks
• Safe Water Marks
• Special Marks
• Emergency Wreck Marking Buoy
- port marks are red and may have a red flashing light of any rhythm except 2+1.
- starboard marks are green and may have a green flashing light of any rhythm except 2+1.
|(Port) (Left) (Red)||(Starboard) (Right) (Green)|
- port marks are green and may have a green flashing light of any rhythm except 2+1
- starboard marks are red and may have a red flashing light of any rhythm except 2+1
|(Port) (Left) (Green)||(Starboard) (Right) (Red)|
|PREFERRED CHANNEL TO STARBOARD||PREFERRED CHANNEL TO PORT|
|COLOUR||RED, GREEN, RED HORIZONTAL STRIPES||GREEN, RED, GREEN HORIZONTAL STRIPES|
|BUOY SHAPE||CYLINDRICAL(CAN), PILLAR, SPAR||CONICAL, PILLAR, SPAR|
|TOPMARK||SINGLE RED CYLINDER(CAN)||SINGLE GREEN CONE POINTING UPWARD|
|LIGHT RYTHM||COMPOSITE GROUP FLASH (2+1)||COMPOSITE GROUP FLASH (2+1)|
When a cardinal mark is seen, remember that clear and navigable water lies on the named side of the mark
A safe watermark indicated the end of a channel ,it usually implies that open , deep and safe water lies ahead. It is sometimes also used to indicate the start and end of a buoyed section of a continuous narrow channel , or a line of these marks can be used to mark of a safe route through shallow water. It is therefore important to consult an appropriate chart to determine the exact meaning in each case . The marker is also sometimes known as a Fairway Buoy.
4. ISOLATED DANGER MARKS:
An Isolated Danger Mark, as defined by the IALA, is a sea mark used in maritime pilotage to indicate a hazard to shipping such as a partially submerged rock.
Its distinctive sequence of flashing white light consists of 2 quick flashes with intervals of 5 seconds.
5. SPECIAL MARK:
Special marks can indicate:
- Administrative areas
- Water skiing areas
- Anchorage areas
- Mooring areas
- Waiting areas
- Marine farms
- Oil wells
- Dead ends
- Spoil ground (an area where dredged material is deposited)
- Historic wrecks
- Protected areas
- Outfall pipes (such as Stormwater, and Cooling water)
- Sewerage pipes
- Intake pipes
- Submarine cables