What does wave mean?

Wave number is not a standard symbol, it is designed by app itself, and it is one of the signals of strong wind or dense fog. According to the weather two days ago, it was windy.

Waves usually refer to waves generated by wind in the ocean, mainly including wind waves, swells and near-waves. Under different wind speed, wind direction and terrain conditions, the size of waves varies greatly, usually with a period of tens of seconds to tens of seconds.