Chapters 142, 143 Approval, All Hands on Deck! (Double Monthly Ticket Extra)

"Alright, let's study these two issues then," He Xingzhou said.

He first learned about the current "Flood Dragon Deep Diving Device." The Flood Dragon Deep Diving Device was capable of manned dives into ocean trenches over ten kilometers deep.

Its method of surfacing involved discarding disposable iron weights. Before descending, it loaded enough iron blocks to sink slowly.

When it was time to surface, these disposable iron blocks were discarded one by one to decrease mass, allowing it to begin a slow ascent.

The reason it didn't use a submarine's water intake and ejection method was that the rapid ascent would mean the diving device's shell could not withstand the deep-sea pressure.

*"Fast descent and ascent hinge on whether the material can withstand the pressure!"*