Low/High Tides

After learning about tidal waves and their lunar schedule it made sense why cruise ships have limited* activities and stops they make depending on the time of day. If these massive cruise ships were to blindly sail into the coasts and any given time they could find themselves in a real pickle. They benefit from having this knowledge so that they can make their drop offs of vacationers on islands at a more precise time. This allows the vacationers to plan around a time approximation so they can plan activities before they get to the island.