Definition
Region B covers North, Central and South America, Japan, South Korea and the Philippines. The lateral colours are reversed relative to Region A: starboard-hand marks are red, conical, with red lights, giving rise to the North American mnemonic red right returning; port-hand marks are green cans with green lights. Shapes and topmark geometry follow the same rules as Region A, so only the colour assignment changes. Cardinal, isolated danger, safe water and special marks are unchanged.
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