I am the landest of lubbers, but I would imagine that lookouts, especially in high traffic areas is a naval tradition.
My expert opinion: This was caused by a series of unrelated mistakes, any one of which might not have been a problem, but all together resulted in this bumping. I don't think there is a single cause of accidents like this.
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abusus non tollit usum - A right should NOT be withheld from people on the basis that some tend to abuse that right.
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