These are views of the Coral Sea and the semi-submersible from the anchored platform at Agincourt Reef, located at the very outer edge of the Great Barrier Reef. Helicopters provide scenic flights over the ribbon reefs.
I took these pictures from the semi-submersible on my 25-minute underwater cruise.
I also spent some time in the underwater observatory with its close-up views of the coral, sea life and fish feedings:
