Oilskins and loose clothing inflate and pull strongly. Halyards rigidly bent. Loud whistle from rigging. Heavy flag straight out and whipping. Dense streaks of foam along direction of wind.
Crests of waves begin to topple, tumble and roll over.
Spray may affect visibility. The resulting foam, in great patches is blown in dense streaks along the direction of the wind. On the whole, the sea takes on a whitish appearance. Tumbling of the sea becomes heavy and shock-like. The sea is completely covered with long white patches of foam lying along the direction of the wind.