Which tidal measurement focuses on the higher tides only?

Mean High Water is the correct focus for measurements of higher tides. This term specifically refers to the average of the higher high waters observed over a period, typically over a 19-year cycle known as the National Tidal Datum Epoch. By concentrating exclusively on the peaks of the tidal range, Mean High Water provides a reliable reference for understanding the elevation that high tides typically reach.

In relation to other choices, Mean Low Water focuses on lower tides and is concerned with the average of the lowest low waters. Mean Lower Low Water also deals with low tide measurements but specifically averages the lower of the low waters. On the other hand, Mean High Water Springs is an average that reflects specifically the heights during spring tides, when the tidal range is at its maximum; therefore, while it does pertain to higher tidal measurements, it is a more specific and variable condition rather than an overall mean of high tides. Hence, Mean High Water stands out by simply focusing on the average of all high, high waters over time.