The document discusses cyber security vulnerabilities in the shipping industry. It identifies three main areas that are vulnerable: automation and control systems, navigation systems, and communication systems. It provides examples of real cyber attacks, including a hacker gaining access to a ship's control systems via a crew member's computer and causing explosions on board that disabled the ship's navigation and control computers, requiring ransom. Navigation systems can be compromised through GPS spoofing or jamming. Communication systems on ships and with headquarters are also at risk from various forms of hacking or interception.