, both of which are key to US power-projection and deterrence.
Their biological sonars enable them to detect things that electronic sonar might miss, such as enemy mines or lost equipment, and sea lions have sensitive hearing and acute eyesight that allows them to monitor the murkiest water for threats like enemy divers. To track the dolphin underwater, the handler will attach a"pinger" device on the pectoral fin of the dolphin that will show the mammal's position. If the dolphin detects something, it will either attack it or surface to alert the handlers, who roam the surrounding waters in small boats.
The US military wasn't the only one using dolphins and sea lions to protect its warships and ports. The Soviet military and its Russian successor also employ mammals for maritime security.
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