One of the things that attracts many people to the coast is the the sight and sound of waves breaking on the shore, particularly after a period of bad weather. Ocean waves represent energy that has been transferred from air moving across the air/sea interface as wind blows. The longer and stronger the wind blows, the greater the energy transfer and the greater the size of the waves. Beginning as small wind waves, the waves grow and transform into swell that can travel thousands of nautical miles across ocean basins. On reaching the shallow water of a coastline the energy moving through the water transforms into steeper breaking waves that release this energy as they break on the shore. Having worked on ships, I have always found the formation processes and the way that waves move interesting. They obey physical laws. Their height and period and velocity can be predicted, based on the speed and duration of the wind. They can steal energy from nearby waves. They can change direction and bend around headlands. Waves, like people, can build and can destroy.