Which region of IALA does the US belong to?

The correct answer is that the United States belongs to Region B of the International Association of Lighthouse Authorities (IALA). This designation is significant because Region B primarily includes countries that follow the IALA buoyage system that employs a red right returning system, where navigation aids on the right side of channels are red, indicating safe passage to the mariner. This system is used in the Americas, as well as in parts of Asia and Africa, which aligns with the navigation practices employed in the United States.

Understanding the different IALA regions is essential for safe navigation and the proper identification of navigational aids, as these regions utilize distinct buoyage systems. Region A, for instance, employs a different system that may lead to confusion if mariners are not aware of these delineations. This geographical and systemic classification is crucial for consistent maritime navigation globally.