Hi Guys,
There are numerous specific wreck diving centres but the best in my opinion are these (that have not been mentioned already):
COLD WATER
The St. Lawrence Seaway in Eastern Canada.
Halifax, Nova Scotia (Titanic Exhibition here too).
WARM WATER
Red Sea has hundreds of wrecks in or around the Gulf of Suez, the more famous grouped around Abu Nuhas and of course the 'Thistlegorm' in Sha'ab Ali.
Further south and east are the outstanding wrecks off the Saudi coast, especially the ones dotted around the infamous Farasan Islands. These include the Iona Steamship. The sharks here are bountiful and big mothers!
The Gulf of Oman
One of the biggest wrecks in the world: The massive supertanker 'Energy' lies just off the coast north of Dubai. Plenty of smaller versions around too.
There are two dive centres in Dubai and can be located on the net. Both good and both offer two centre vacations with reef diving on the east coast.
LABUAN WRECKS
Run by Borneo Divers, Managed by director Randy Davies (American).
Read the article I posted in places to dive.
Bob (cybergoldfish) Whorton