Advised (dashed black line), planned (dashed blue line) and followed (red line) descend path of <a href="https://en.wikipedia.org/wiki/KLM_Flight_823" class="extiw" title="en:KLM Flight 823">KLM Flight 823</a> on 12 June 1961. Based on the investigation report.
<a href="//commons.wikimedia.org/w/index.php?title=User:Gijs&amp;action=edit&amp;redlink=1" class="new" title="User:Gijs (page does not exist)">Gijs</a>
<span class="int-own-work" lang="en">Own work</span>