I took this photo from a ball at Maho Bay this past Tuesday around 10:00am. Anyone know what happened?

Crew got off safely. Looked like it occurred to the NW of Johnson Reef, just outside the park boundary. Islands in the background are the Hans Lolliks. I couldn't tell if it was a mono or cat. Burned for about 2 hours before sinking.

How long does it take for something like this to get marked on charts, if ever? I'm guessing it went down in ~75+ feet, so probably not a hazard to navigation.