If you examine the chart 16723 at:
http://www.charts.noaa.gov/OnLineViewer/16723.shtml
Take a close look at the South end of Kayak Island.
Then go to Google Earth and examine the aerial view of the same area.
Then bring up the tide table for Aug 27, 2005 on your chart plotting
software.
Notice the following: there was no minus tide on Aug 27 and notice the
date that the Google Earth picture was supposedly taken, Aug. 27. Now
examine the chart and the aerial view. The submerged shoal at the south
end, east side of Kayak is below datum in the chart, but clearly visible
in the photo.
Notice also that shadows indicate that the sun is coming up in the east,
that it is early morning.
The tide height at daylight at 6 am is about 4 feet above datum and
flooding, it can't be later than about 9 am, when the tide is high at 6
feet over datum. Therefore the tide was between 4 and 6 feet above datum
at the time the photo was taken, ASSUMING that the date of the photo
is in fact Aug. 27, 2005. The total range of tide on that date was about
8 feet.
Since not only is the sand spit above water, but so is the rest of the
nearby beach which should be underwater, it implies that the whole end
of the island has been uplifted, perhaps during an earthquake, since the
last survey; not simple shoaling from sand buildup. The survey list for
that chart is located in the white area about near the chart top, and
near the middle. None of the nearby area has been surveyed since the
1964 earthquake.
This is a dramatic example of uplifting, that anyone with access to the
internet and some extra nautical tools can visually see. I would
estimate that the uplift in this location is at least 10-15 feet. Most
charts in this area carry warnings of such uncharted uplifting.
Regards,
Mike
Capt. Mike Maurice
Tigard Oregon(Near Portland)