Chapter 91: Upgrade Template

```

Soon, the squadron of fighter jets arrived at the sea area in question. Heeding the warnings from the rear command center, they monitored the sea surface from a distant high altitude, offering no opportunities for the Drone to take advantage of. The two US Navy guided missile destroyers also arrived, initiating a search beneath the sea surface, followed by the arrival of Japan's escort ships, which joined the search. By this time, however, the Drone had already left the sea floor far behind this area, and their search for traces of the Drone was doomed to fail.

The Drone continued its high-speed underwater journey until it was clear of danger before stealthily concealing itself under a large coral reef at the bottom of the deep sea, using the coral reef to block any attempts at detection.