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No matter when, being a diver has always been an absolutely high-risk and adventurous profession.
The pressure of seawater increases tremendously with depth, and divers who often train underwater are prone to decompression sickness. Furthermore, if they are not mentally strong, they may also develop a fear of deep-sea claustrophobia.
But in reality, most divers usually work at depths of less than 40 meters. Even though there are records of dives hundreds of meters deep, their practical significance is quite limited, and they are rarely attempted.
The total length of the CZ-18 launch container is 260 meters. After dismantling the exposed part above the sea surface, which is 40 meters, there remains 220 meters, with at least 180 meters submerged underwater. At this depth, only professional submarines and underwater robots can perform operational tasks.
