1. Club members require strict training and must have a diving certificate before they can dive in international waters that are open to the divers.
2. The presence of the US aircraft carrier in waters near China's eastern coast is widely perceived as an open threat to China's security.
3. That's when the teacher asked the students to smash open the window so that the waters could recede.
4. The US says waters 12 miles from China's shoreline are open to shipping.