What is a 6KRW in terms of navigational aids?

A 6KRW refers specifically to a red/white/red range board used in navigation. Range boards are critical navigational aids that help mariners align their vessels with a designated path or channel. By visually aligning the boards, a navigator can determine the proper course and ensure safe passage through areas that may have hazards or obstacles. The coloring—red, white, and red—provides clear visual cues that enhance the visibility and effectiveness of the board, especially under varying lighting and weather conditions.

In contrast, a yellow navigation buoy typically indicates caution or a specific point of interest, such as a hazard or underwater object, while a type of lighthouse serves more as a fixed point of reference rather than a direct guidance aid like a range board. An underwater marker, on the other hand, is designed to indicate submerged obstacles and would not provide the same visual alignment guide as a range board does. Thus, the identification of the 6KRW as a red/white/red range board is accurate and reflects its function in navigational safety.