The tracking of ships is voluntary. The International Convention for the Safety of Life at Sea – signed by 167 countries – requires almost every commercial vessel to carry a radio transponder that broadcasts the ship’s identity, position, speed and heading to port authorities, coast guards and commercial tracking networks.
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It worked! The middle print statements prove that the value 0x41414140 was successfully written and read from memory. The last print shows that a SIGTRAP was delivered to our process when we called getchar after patching it.