Emperor Divers is now located in new custom-built premises at the Touristic Harbour El Mina, which is next to the main ferry port and close to the main shopping area. But the best bit is that it's 30 minutes closer to the most popular dive sites such as Abu Nuhas, Thistlegorm and a stone's throw away from Giftun Island.
Link for the page
Hurghada Diving Information by Emperor Divers Red Sea
think they were a Little restricted by the hotel so they jumped ship to new premises.
HTH
Dave