Originally Posted by
G0ULI
..Essentially the crew were mislead by an approach chart that did not highlight the danger presented by Black Rock. Radar information that might have revealed the hazard at an earlier stage appears to have been overwritten by other data on the multi function display...
Essentially the crew were mislead, by their own assumption, by an approach chart
that was not an approach chart applicable for what they were doing. The approach chart they were using was a route guide intended for visual manoeuvre, not an approach chart with vertical and lateral profiles that would establish them clear of obstacles for when they were not visual. As far as we know, the danger of Blackrock was not specifically highlighted in the route guide, other than its spot height appearing on the chart.