What does the phrase "Red, right, returning" remind vessels about?

The phrase "Red, right, returning" is a mnemonic used by boaters to assist in navigating inland waterways in accordance with the IALA (International Association of Lighthouse Authorities) system. This phrase specifically refers to the lateral buoyage system, indicating that when returning from sea or heading upstream, boaters should keep red buoys to their right side. This helps ensure safe passage by maintaining a proper course and avoiding hazards that may exist in the waterway.

Understanding this phrase is critical for safe navigation, as it guides vessel operators in identifying the correct side on which to pass markers, which are essential for indicating channels, hazards, and navigational routes. In contrast to the other options, which relate to different aspects of boating safety, this mnemonic directly addresses the importance of buoy placement and navigation in accordance with established standards.