Mean High Water (MHW) is used to relate tides to chart depths and for harbor approaches. Which statement best describes MHW?

• A. The average of all low tides; used to relate tides to chart depths.
• B. The average of all high tides; used to relate tides to chart depths and harbor approaches.
• C. The zero datum for depth readings.
• D. The highest tide observed this month.

Answer: (B)