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## The Equipment Staging Operation
The logistics of moving equipment through several kilometers of flooded cave passages before the extraction began represents a scale of operation that rarely receives detailed attention in accounts of the rescue.
Each extraction diver would need to bring a sedated boy through approximately two to three kilometers of flooded passage, with sections requiring the diver to push the boy ahead of them through gaps in the rock. The diving equipment for the extractions — the full-face masks, the buoyancy control devices, the oxygen tanks and their regulators — needed to be staged at the right points inside the cave before the extractions began.
The oxygen tanks themselves were the largest logistical challenge. Each diver needed sufficient oxygen for a transit to Nern Nom Sao, the administration of sedation, and the return transit with a sedated passenger. The return trip, with an unconscious person to manage, would take longer than the inbound trip. The staging operation involved moving hundreds of oxygen cylinders through the flooded passages and positioning them at Chamber 3 and at intermediate points along the route where divers could exchange depleted tanks for full ones.
This work was done by the diving teams and Thai Navy personnel over the days between July 2 and July 8. It was unglamorous, difficult, and absolutely necessary. Without the pre-staged equipment, the extractions could not have been executed on the timeline that the monsoon window required.
The same staging operation also addressed the guideline situation. The guidelines that had been placed during the search had been placed for navigation; the guidelines needed for extraction had to meet a higher standard. They needed to be continuous, secure, and arranged so that a diver managing a sedated passenger would not lose them. The teams checked, reinforced, and in places replaced sections of guideline during the supply and staging runs.