That picture must have been taken in relatively shallow water
. Having just sat through the Tsunami wave here in Kona, can tell you in deep water there was absolutely no indication when the Tsunami wave(s) passed under us.
Would really like to know just how shallow the water was that that ship was in. It's really critical for owners in making a decision on how to react to a Tsunami. The word on the Coast Guard weather
broadcasts was get to water deeper than a 100 fathoms/600'. Not a problem here as it's deeper than that a 1/4 mile from shore. In areas with continental shelves like the East Coast
, it would be nearly impossible to get to that depth
unless you were given quite a few hours of warning and were able to get underway immediately. From experience, getting to sea is the best defense against a Tsunami if you can get into adequately deep water. The question is how deep water is adequate. Don't think 100 fathoms is a hard and fast mininum necessary depth
as the Tsunami wave here was not a problem except in areas where the wave was funneled into a V shaped bay or the restricted waters of a harbor. The Tsunami Warning people need to come up with a prediction of wave height based on water depth and the general shape of the coastal area for all the coastal areas of the country.
Know that leaving a boat in a harbor is not a very good way to have your boat survive a Tsunami. Even though we had a relatively low height wave it sunk or damaged a whole bunch of boats, mostly on Maui and Keehi Lagoon
. In our harbor (Honokohau), one boat was sunk, one severely damaged, and many with fairly extensive cosmetic damage as they were repeatedly slammed up against the concrete walkways for the more than 12 hours that the surge lasted in the harbor.