What is 'Amplitud de Marea' (Tidal Range), and why is it significant for sports boats in Chilean coastal bays?

1. The horizontal distance between high-tide and low-tide shorelines
2. The duration in hours between two consecutive high tides
3. The vertical difference in height between Pleamar (high tide) and Bajamar (low tide), affecting available water depth at docks and ramps
4. The maximum speed of tidal currents in the center of the bay