buoyage


 

 
IALA system 'A'
   
 
IALA system 'B'
 

Unlike in Aviation navigational systems are not standardised world-wide. Whilst the cardinal system is universal, the lateral system is divided into two regions, the Americas and the rest of the world. Most countries operate with the port (red) buoys showing on the left hand side when  entering a channel with an incoming tide. In the Americas, the system is reversed.