"Dad, have you found any trace of Pepper?"
The moment he landed on the ground, Tony Stark anxiously asked Chen Mo.
"They left by sea. I've already had J.A.R.V.I.S. use satellites to search the surrounding vessels."
"I'll look too!"
Although Tony Stark knew the satellite search would definitely be much faster than him, his anxiety still made him rise into the air and begin searching over the sea!
However, in the end, neither the satellites nor Tony Stark found anything!
Even the fastest speedboat would not exceed two hundred kilometers per hour, and only around ten minutes had passed since the attack. At most, the attackers could have escaped a few dozen kilometers. Yet J.A.R.V.I.S. had searched everything within a two-hundred-kilometer radius. Even if they had been traveling in a supersonic aircraft, they could not have escaped that range, but there was still no trace of them!
Chen Mo was not surprised by the result!
Judging from the enemy's performance throughout the attack, their plan had been extremely thorough. The entire operation had been swift and covert, so they would naturally have prepared a reliable escape route after succeeding.
In fact, Chen Mo could roughly guess what method they had used. The sea surface was difficult to conceal oneself on, so the most likely possibility was a submarine.
Due to the special conditions underwater, radar could not be used, and detection could only rely on sonar.
The Iron Man suits were not equipped with sonar. The only suit designed for underwater operations, Mark XXXVII, had a very limited sonar detection range. By the time they obtained high-powered sonar from elsewhere, the submarine would already have escaped the detection radius.
Moreover, sonar detection had major weaknesses. If the submarine they used was quieter than the ocean's background noise and had been