"Uh... Coach Xu, I've learned diving." Song Xiaodong raised his hand.
"What about you guys?" Xu Duoduo glanced at the others.
Sun Yiyi said, "I've dived... once."
Chu Xianling, Dragon Three, and Dragon Nine all shook their heads.
"Alright, let's start from the beginning, first introducing the diving equipment."
Xu Duoduo began speaking: "There are two types of diving equipment, light and heavy, and heavy diving equipment, which cannot work suspended, has been gradually phased out."
"During diving, pay attention to the application of buoyancy; different diving depths require different weights and buoyancy adjustment devices, and the frequency of breathing depth must change accordingly."
"As for sea diving, it is essential to learn how to use a snorkel and regulator, as well as surface rest and handling various emergencies."
"Especially for thrill-seekers like you, it's even more important to learn how to handle all sorts of emergencies."
