Orbital waves occur at the ocean surface.

The speed of deep water and shallow water waves are the same.

The still water level is halfway between the wave crest and wave trough.

Surf beat is the irregular pattern of wave breaks that occur on a beach due to mixed wave interference.

There are 5 major tidal power stations that have been built (or are being built). 

A tidal generating station provides 'base power' to the electrical grid.

A shoal is just a place with shallow water.

Ocean waves form on the air-water interface.

Gravity waves have wavelengths exceeding 1.74 cm.

The centripetal force is the required force for the tides.