Claim: The list of lighthouses in the Coral Sea Islands includes the East Diamond Island Lighthouse on East Diamond Island and the Frederick Reefs Lighthouse on the Frederick Reefs (220 nautical miles northeast of Gladstone, Queensland.
Evidence: Frederick Reefs East Diamond Islet Lighthouses are located on following reefs or islands: Frederick Reef is in the Coral Sea Islands, over 220 nautical miles (410 km) northeast of Gladstone, Queensland. Frederick Reef is a small atoll with a large rock called Ridge Rock at the southern end, a sand cay called Observatory Cay, and a lighthouse at the northern end, which is the only permanently dry land, although there are a few of others cays that can be awash at high tide.