It's not Constantinobal it's Istanbul.
Hello,
welcome to our hang out on the web. Don't worry, we had a party for you, sorry you missed it!
Anyway, I have been diving in Jamaicia so if you could tell me what part of the island you are staying I might be able to help you out a little more.
As far as advanced diving, there really is none in Jamaicia. Every dive is a group dive lead by a DM by Jamaican law. The reefs have been fished clean of all but the smallest fish. However the water is warm and clear and the ganja is outa'sight!