Okay another question. I guess we will need a dive flag to dive there, right?
Not really, and I've never seen one being used in that area other than for rescue classes.
A lot of boat traffic comes thru that area from FI's yacht club. Not the big boats, but skiffs and PWCs (google that one

) sometimes pass at a pretty good clip. Some employees can be predictably seen blasting through headed East at about 4:30pm daily.
At certain times a year they "entertain" wealthy younger visitors from the mainland who like to go fast and do other questionable things. On such busy weeks, like Semana Santa, look around, beware, act appropriately. I would avoid any personal confrontations with them or their bodyguards over what you may be see as otherwise unruly or dangerous behavior. Nothing to fret over otherwise.
Get in, get down to follow the cable and visit the wrecks, if you must surface for orientation (first kick yourself in the head for not studying the orientation maps), do so nearer to the vertical walls. I would never, ever surface directly above the shipwreck. The CCV boats motor through the area at 5mph max, but you really can not predict the behavior of anyone else.
The best time to enjoy this area is for a night dive, as,
if you understand the diagrams,
you simply can not get lost. At night, there is no boat traffic.