Originally Posted by
drugsdontwork
What makes you think they hadn't seen them? ...
For me, a 300ft island 700m long by 450m wide would be giving a strong, distinctive return. Enough that it should have challenged the crew's mind's eye view of the situation.
My impression is that they expected a small low lying island ... and they identified it, incorrectly. The presence of a larger contact might have been compelling.
Rather than look to identifying the cause, I prefer to look at what could have prevented it. I think that a clearer closer radar range scale would be one of them.
DDW can you answer whether the S92 allows an altitude constraint to be entered against a WP or leg in the FMS database?