; (3) the need for vertical evacuation structures for units and sectors in which an evacuation of a tsunami inundation zone cannot be completed on foot within 15 minutes of the detection of a seismic event; and (4) whether the plans established under subsection (a)(1) achieve the purpose to protect human life and ensure the ability for the Coast Guard to provide search and rescue operations following a tsunami event in the area. (c) Definitions In this section: (1) Seismic event The term seismic event means an earthquake, volcanic eruption, submarine landslide, coastal rockfall, or other event with the magnitude to cause a tsunami. (2) Tsunami inundation zone The term tsunami inundation zone means an area of inland flooding modeled, predicted, or forecasted as a potential result of a tsunami or seismic event. (3) Vertical evacuation structure The term vertical evacuation structure means an elevated structure above the tsunami inundation zone designated as a place of refuge from flood waters. 205. Study on Bering Strait vessel traffic projections and emergency response posture at the Port of Point Spencer, Alaska (a) In general Not later than 180 days after the date of enactment of this Act, the Commandant shall seek to enter into an agreement with the National Academies of Science, Engineering, and Medicine, under which the Marine Board of the Transportation Research Board (in this section referred to as the Board ) shall conduct a study to— (1) analyze commercial vessel traffic that transits through the Bering Strait and projections for the growth of such traffic during the 10-year period beginning after such date of enactment