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John Konrad -
Despite the availability of satellite navigation systems, and ships that are awash with electronics, maritime buoyage still matters, particularly in pilotage waters where visual aids provide the best possible way of marking a channel or identifying obstructions.
These days, buoys can be “intelligent” in that they have radar reflectors to help them show up on ship radars, possibly fitted with electronic beacons that show up on electronic charts and even made individually identifiable through their own Automated Identification System signatures. Buoys still remain very useful indeed.
It is the International Association of Marine Aids to Navigation and Lighthouse Authorities (IALA) which provides the global pattern for the maritime buoyage system. It established an internationally-accepted system in 1970 which set the colours, shapes, topmarks , lights etc for buoys, so that seafarers can use them around the world, even though there remain some differences between the two geographical zones with which history has left the industry.
The mariner uses buoys much as he always has, as an indication of his position and to show him the extent of a navigable channel, or to mark an isolated hazard, such as a wreck over which his ship should not pass. Buoys use distinguishing colours, marks and shapes to assist the navigator in their use. The new system provides for a newly designed wreck marking buoy, and clearer distinguishing marks, along with provisions for more use of electronics and some ingenious new methods of lighting.
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