Its worse than I thought.
1. They had two electronic charts
with different positions for the reef--the CO was aware of the discrepancy and chose the (wrong) more detailed chart. He neglected readily available information like the light list which would have highlighted the chart problem.
2. They used the open ocean navigation
mode in near-shore waters.
3. The navy
recreated the scenario and the navigation
system put out something like 12 visual and audio warnings--which were ignored.
4. The lighthouse was first picked up on radar
and visual over an hour before grounding, and was identified as a lighthouse (not in its expected position) over half an hour before grounding. They even knew it was the right lighthouse in the wrong position.
5. The watch changed shortly before the grounding, and the new watch was made aware of the lighthouse in the wrong position, but neither watch figured out that this might be a problem--they just watched their expensive chartplotter
and didn't slow down until they hit the reef.
If these guys were on watch on my boat
, I wouldn't be able to sleep.