Originally Posted by
gulliBell
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.
Irish Aviation Authority use a red circle as the symbol for a lighthouse (with no text). The CAA use a blue circle with l'hse next to it.
So the red circle with 282 next to it was, in theory, all that was needed.