The drone flew northward, crossing the first island chain that extends southward from Japan and entered the vast Pacific Ocean. Then it lowered its altitude again, submerging below the sea surface and continuing to test the various data of the drone.
Under the sea, the drone kept descending. Its dive depth changed from six hundred meters to one thousand meters, and at this depth, the drone did not experience any pressure. So it continued to dive, quickly reaching a depth of two thousand meters and discovering that the drone still operated freely and had space to go even deeper. It continued down to three thousand meters, four thousand meters, five thousand meters.