What colour is used for the topmark of a Lateral Starboard Hand Mark in Region A?

In the IALA Maritime Buoyage System, the color of the topmark for a Lateral Starboard Hand Mark in Region A is red. This color designation is crucial as it helps mariners identify the signal, ensuring safe navigation. The use of red for the starboard hand mark aligns with the overall color scheme of maritime buoyage, where red typically indicates the right side of a channel when approaching from the sea.

This visual cue is essential for night navigation as well, since mariners rely on the distinct colors to ascertain their position relative to navigable waters. The red topmark's consistency across various markings contributes to safe maritime practices, enabling recognition and adherence to navigational routes. Understanding the significance of this marking helps to ensure that vessels stay within safe passages and avoid hazards.