Point A: Occulting White, Red And Green Light Twice Every 8 Seconds
Point B: White, Red And Green Group Occurring Twice Every 20 Seconds
Point C: Red Flash Every 3 Seconds
Point D: 5 Red And White Flashes Every 20 Seconds
If you pair these locations up in the right way and draw lines between them you can derive a point where the lines cross.
Because coordinate systems and map projections can vary I recommend that you use geocachingtoolbox.com for your calculations of crossing point.
To get the final coordinates you need to project a line from the crossing point of 247.698 km on a bearing of 0.6158° . The line ends at the cache's location. The website that you used to find the crossing point has a tool to do this too.
There’s no geochecker for this one – plug the final location into Google Streetview and look at the buildings for confirmation that you’re right!