Gidday DB,
Regarding the Yongala wreck.... the boat sank 11 nautical miles off the coast of Cape Bowling Green ( North Queensland) in March 1911 during a cyclone, all 122 passengers were lost with the ship. Exactly what happened is unknown, although the fact no life rafts were found indicates the loss was sudden and tragic.
She lies in 14-28 metres of water and is 109 metres long, and is one of the largest shipwrecks in Australia She is now protectd under the Historic Shipwreck act
The artefacts, marine life, and variety of Corals are pretty impressive. Turtles, seasnakes, giant trevally, Queensland gropers eagle rays, bullrays, sharks and in the cooler months humpback whales.
Options are a 1 day trip with 2 dives or a 3 day/ 3 night liveaboard with 10 dives taking in the Wreck and Wheeler and Davies reef. Both Mike Ball ( use to run a liveaboard operation there a few years ago ) and I are of the opinion that Wheeler and Davies are stunning locations and challenge many of the local Cairns reefs for quality. Only small problem with the Liveaboard boat is she is a bit shabby but what the heck... just a bed right?
Finally Yongala is exposed to the elements and cancellations due to winds ( 20 knots about the cut off ) can be frequent for the day trip
Cheers Andy