This site is generally known just as "The Dredge". It's the sister ship to "The Barge" which is sunk nearby and is an easy swim (star droppers show the way).
This is probably one of the best wrecks available to OW divers in SA. The deck is about 14m, and the sea floor is 20m making is a easy dive.
There is typically a few schools of fish swimming over the wreck, plus crabs, cuttlefish and other creatures hiding under the hull.