OP is correct, it is the C-53. It was sunk about 5 - 6 years ago. You can find lots of info if you search the web for it.
I have dove it three times in the last two years. In 2003 there was a huge bait ball; millions of bait fish hanging out inside. Where the food goes, the predators go! There used to be a decent sized Nassau Grouper that hung around the deck, and a large grouper inside the ship, plus a couple wary Barracuda outside. The bait fish were gone in 2004, but the pairs of Angels were still hanging around the deck and there were lots of Glassy Slippers down in the engine compartment.
There isn't a lot of growth on the C-53 yet, but it is getting better each year. The propeller is dramatic, and there are some good spots for pictures at the wheelhouse. There is a stairway inside that can be photogenic, but my best picture is of a stairway out on the deck.
I really liked the wreck in 2003, and I knew that my buddy would love it when we went in 2004. So I begged and pleaded with our dive op until we were allowed to do it. Of course my buddy loved it. I will definitely try to fit it into my dive schedule whenever I return.
There are some large cutouts in places on the sides, and ropes leading through some of the compartments. I need to find my photos to post . . . .
Enjoy, and let us know how you liked it!
Wristshot