Question 1051Navigation General

The correct answer is A) No noticeable change from the existing sea state. In the open ocean, a tsunami typically does not cause a noticeable change in the existing sea state. Tsunamis are long-wavelength, low-amplitude waves that are virtually undetectable in the open ocean. The wave height of a tsunami in the open ocean is generally less than 1 meter, making it indistinguishable from normal ocean swells. Options B, C, and D do not accurately describe the typical open-ocean behavior of a tsunami, as they suggest much more dramatic changes to the sea state.