What shape is typically used for a port hand buoy in both IALA regions?

In the IALA Maritime Buoyage System, a port hand buoy is typically cylindrical in shape in both regions A and B. This standardized shape helps mariners quickly identify these buoys when navigating, as the familiar form is easily recognized and associated with specific navigation information.

The cylindrical shape is effective in providing stability in water, allowing the buoy to remain upright and visible in various sea conditions. This visibility is crucial for safe navigation, as port hand buoys mark the left side of the channel when approaching from seaward. Their consistent shape contributes to the clarity of the buoyage system, helping to reduce confusion for vessels maneuvering in congested or complicated waterways.

While other shapes may be used for different types of buoys, the cylindrical design specifically identifies the function of marking port sides, ensuring that maritime navigation remains safe and effective.