Which term describes the maximum wave height achievable under a given wind condition?

• A. Fully Developed Sea
• B. Interference
• C. Gravity Wave
• D. Fetch

Answer: (A)

When wind blows steadily across the ocean, waves grow as energy is transferred from the wind to the water. They keep increasing in height as long as the wind continues and the fetch is long enough, but eventually a balance is reached: the energy input from the wind is offset by energy loss due to friction, breaking, and wave interactions. At this point the sea is in a fully developed state, meaning the waves have reached their maximum height for that given wind speed, duration, and fetch. So the term that describes the maximum wave height achievable under a given wind condition is the fully developed sea.

This concept differs from interference, which is about how waves combine to form patterns; gravity wave describes the type of wave where gravity is the restoring force, and fetch is the distance over which the wind acts—important factors in development but not the name of the state describing the maximum height.