02/25/2013 10:02 am ET Updated Feb 25, 2013

Chinese Tourist Dies During Dive With Miami's RJ Diving Ventures (VIDEO)

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A woman died Sunday while diving with a Miami Beach scuba company, the same that reportedly left two divers stranded in open water in October 2011.

The tourist was Chinese, didn't speak English, and appeared nervous before the dive, NBC 6 reports. Although everyone was paired up with a diving buddy, those aboard said the woman must have dived alone and panicked.

When they found her after a two-hour search, her lifeless body was wearing the weight belt but no other scuba equipment.

“She sank right to the bottom because she was wearing weights; it’s very difficult to keep yourself up,” Jaclyn Hesse, a diver on board, told CBS 4. “If she had taken off her weight belts first and then taken off the BCD she would’ve stayed afloat.”

Divers told NBC 6 it was as if she grabbed onto an anchor instead of a life preserver.

"Nobody here did anything wrong," Ariane Dimitris, a scuba instructor on board, told WSVN. "She shouldn't have gone alone. If she missed her buddy, she should have stayed on the boat or asked the dive master to go with her or something but nobody knew that she went in by herself."

This is not the first incident for the Miami Beach dive company.

In October 2011, two divers were left stranded in open water off Key Biscayne for two hours. One of the divers told CBS 6 that RJ Diving Ventures Captain Mike Beach apologized, saying "somehow he missed [their] names …when he checked the log before leaving with the other divers." There were reportedly only two other divers to keep track off.

"I do not know how the two divers got checked off without them being on the boat or who is to blame,'' RJ Diving Ventures owner Robert J. Arnove told the Sun Senitnel. "We are still trying to figure that out while devising a further failsafe system to prevent this from ever happening again.''

Arnove founded RJ Diving Ventures in 1982, operating first out of Key Biscayne's Miami Marine Stadium before moving to Miami Beach Marina in 1984.

The U.S. Coastguard and Miami-Dade Police are now investigating Sunday's death.