A construction company is planning two maritime projects at different estuarine sites. Harmonic analysis of tide gauge data has identified the amplitudes (m) of four primary components, as given below. Component Site A amplitudes Site B amplitudes 01 0.21 0.69 K 0.19 0.75 M 2.15 0.13 S2 0.70 0.25 1) Make an estimate of the Highest Astronomical Tide (HAT) level at Site A and the Lowest Astronomical Tide (LAT) level at Site B, assuming that these estimates are taken about Mean Sea Level. 2) If the Chart Datum at Site A is 4.5 m below Ordnance Datum (OD) for the land and MSL is 5.1 m above CD, what is the level of HAT relative to OD? 27 A construction company is planning two maritime projects at different estuarine sites. Harmonic analysis of tide gauge data has identified the amplitudes (m) of four primary components, as given below. Component Site A amplitudes Site B amplitudes 01 0.21 0.69 K 0.19 0.75 M 2.15 0.13 S2 0.70 0.25 1) Make an estimate of the Highest Astronomical Tide (HAT) level at Site A and the Lowest Astronomical Tide (LAT) level at Site B, assuming that these estimates are taken about Mean Sea Level. 2) If the Chart Datum at Site A is 4.5 m below Ordnance Datum (OD) for the land and MSL is 5.1 m above CD, what is the level of HAT relative to OD? 27