Which buoy aligns with the IALA guiding principle of 'safety of navigation'?

The IALA guiding principle of 'safety of navigation' encompasses all buoys within the IALA system, making the answer that includes all buoys the most appropriate choice. Each type of buoy—whether it is a starboard, port, special mark, or any other category—plays a distinct role in aiding mariners by providing essential navigational information.

Starboard and port buoys indicate safe water channels and navigational directions. Special mark buoys denote specific areas or intrusions in navigable waters. Together, all these buoys contribute to the overall safety and efficiency of maritime navigation by helping vessels navigate safely through hazards, marking channels, and guiding the movement of ships.

Thus, the safety of navigation is supported through the comprehensive use of the entire buoyage system, and not limited to just one type. This inclusive application ensures that all necessary information is conveyed to mariners navigating in various maritime environments.