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Beneath the waters of US naval bases, dolphins patrol in silence. They are trained to detect underwater mines, locate enemy divers, and protect some of the most sensitive military assets in the world. At Naval Base Kitsap in Washington state, where more than 2,000 nuclear warheads are stored, these animals serve as living security systems. They can see and hear what divers cannot. They can find explosive machines often miss. This capability was born out of Cold War urgency. In the late 1950s and early 1960s, United States began studying dolphins for military use, recognizing their natural sonar made them uniquely qualified for underwater detection.
The Soviet Union quickly followed, launching its own classified program. Both nations understood the same reality. Control of the oceans would depend not only upon ships and submarines, but on detecting threats hidden beneath the surface. Why were dolphins chosen? What were they trained to do? How long did the programs last, or are they still ongoing? Hello, I'm Colin Heaton, former history professor, Army Marine Corps veteran, and welcome to this episode of Forgotten History. Beginning of the toughest 26 days in Marine Corps history. With confidence in our arms The 36th President of the United States died this afternoon.
Tell them there are children and women in here and to call it off. The US Navy began dolphin research in 1959 during the Cold War, when underwater mines, enemy divers, and harbor sabotage posed growing threats to American naval power. Early sonar systems struggled in shallow, cluttered water. Dolphins' natural echolocation allowed them to detect objects buried in mud or hidden in murky harbors with a precision machines could not match. In 1964, scientist James Fitzgerald established a classified laboratory in Key West, Florida to study dolphin hydrodynamics for submarine and torpedo design. But the research quickly shifted.
Dolphins were not just useful for studying water flow. They could be trained to locate objects, identify underwater targets, and return reliably to their handlers. What began as experimentation evolved into the Navy's Marine Mammal Program. Dolphins were integrated into mine detection, harbor defense, and underwater reconnaissance roles. The Navy had found something unexpected, a biological sonar system that could operate where our technology failed. Training dolphins for military use relied upon the same principles used with military working dogs. They were conditioned through repetition and reward, allowing them to perform tasks reliably in operational environments.
Trainers taught them to search designated areas, identify specific underwater objects, and return immediately after making a detection. Because dolphins operate using natural echolocation rather than emitted mechanical signals, they could search without revealing their presence, giving them a critical advantage in contested waters. Dolphins were trained to detect underwater mines, locate enemy divers, patrol restricted waters, and mark suspicious objects for recovery or investigation. These missions carried real consequences. A single naval mine could destroy a ship and kill its crew. A single enemy diver could place explosives underneath the vessel undetected. Dolphins could locate these
threats before damage could occur. Their ability to work in murky waters, shallow coastal waters, and high noise environments made them more effective than many early sonar systems. The Navy has long maintained that dolphins were not trained to deliberately kill enemy swimmers. Their primary role was detection and interdiction. Once a threat was identified, human forces would respond. In an era defined by underwater sabotage, covert infiltration, and nuclear deterrence, dolphins became an asset. As the program expanded, dolphins began working alongside the Navy's elite underwater units, including the frogmen who later became the Navy SEALs in 1962.
These divers operated in dangerous environments where underwater threats were difficult to detect. Dolphins provided a critical advantage. Their natural stealth and echolocation allowed them to search areas more effectively than human divers. Admiral Richard Lyon, a Navy SEAL who observed the program, later described their value. Quote, "The dolphins were quite simply irreplaceable as combat force multipliers due to their stealth, speed, intelligence, and the fact that being a natural part of the aquatic environment did not draw unwanted attention. They could do what no human could." End quote.
Early operations demonstrated their effectiveness. During the SEALAB missions of the mid-1960s, dolphins assisted divers by delivering tools and supplies to underwater work sites. In 1966, a dolphin named Tuffy located a lost Regulus missile component on the ocean floor. Dolphins proved quite capable of identifying specific underwater objects with remarkable precision, even distinguishing between similar metal shapes in murky shallow water where electronic systems often failed. and high noise coastal environments where sonar reflections and debris confused mechanical detection, dolphins could still locate mines and suspicious materials. In 1967, the program relocated to San Diego where it remains headquartered today.
Bottlenose dolphins were deployed during the Vietnam War to guard harbors and patrol waterways in Southeast Asia, including Cam Ranh Bay and sections of the Mekong River. These were not training exercises. Naval vessels anchored in hostile waters faced the risk of underwater mines and enemy combat swimmers. Dolphins were tasked with detecting intruders before explosives could be placed beneath ships. California sea lions were also trained to recover test ordnance and attach lines to underwater objects for retrieval. Their success in these roles expanded the program further. By the end of the Vietnam era, marine mammals were no
longer in a novel experiment. They had become integrated assets in naval mine countermeasures and harbor defense. They were trained to detect underwater mines, identify intruders, mark threats, and assist in recovering sensitive equipment from the ocean floor. These missions protected ships, secured harbors, and prevented underwater sabotage. California sea lions were added to the program as they excelled at recovering objects and attaching retrieval lines to underwater equipment, allowing Navy teams to recover test ordnance and sensitive material safely without exposing human divers to unnecessary risk. The Navy evaluated several marine species, including beluga whales, but bottlenose dolphins and sea lions proved the most reliable and adaptable.
Their ability to dive deep, operate in low visibility environments, and perform precise tasks made them uniquely suited for mine countermeasures and harbor defense. In 1986, Congress authorized the Navy to collect the dolphins for national defense. Dolphins had become a strategic asset capable of detecting underwater threats that machines often missed. The program became publicly known during the Persian Gulf War in 1991, when dolphins were deployed to support mine clearing operations. Naval mines posed a serious threat. A single undetected explosive could destroy a ship or block access to critical ports.
Dolphins were used to locate these mines before vessels enter dangerous waters. Their role became even more visible during the Iraq War in 2003, particularly near the port of Umm Qasr. This harbor was essential for delivering humanitarian aid and military supplies. Dolphins were deployed to search for underwater mines hidden along shipping routes. When a mine was detected, they marked its location so Navy teams could neutralize it safely. Despite persistent rumors, the Navy has maintained that dolphins were used for detection, not attack. Their natural sonar remained more effective than any mechanical systems, making them a reliable tool for protecting ships and
securing strategic harbors. Their intelligence, endurance, and ability to operate at depth allowed them to search areas human divers cannot safely or efficiently reach. By 1994, the Navy adjusted its handling policies to better protect the animals, limiting transfers between drastically different water temperatures except in emergencies. Despite advances in robotics and underwater drones, dolphins remain difficult to replace. Machines can fail, lose signal, or miss buried objects. Dolphins can adapt in real time and continue searching in environments where electronic systems are unreliable.
The Soviet Union launched its own military dolphin program in 1965 at Sevastopol on the Black Sea. Inspired in part by American research, Soviet scientists initially studied dolphin echolocation and hydrodynamics to improve sonar and underwater propulsion systems. But, like the US effort, the program quickly moved beyond research and into training. Dolphins were used also to detect mines, guard naval bases, and identify enemy divers operating near sensitive facilities. Soviet planners were particularly interested in the animal's silent movement through water. Understanding how dolphins generated speed without producing detectable turbulence had potential applications for both submarines and torpedoes.
As the Soviet program matured, efforts began to surface suggesting it extended further than the American model. Former trainers and post-Soviet accounts have claimed that dolphins were trained to carry explosives, ram enemy divers, or attach devices to hostile vessels. While documentation remains limited and some claims are difficult to verify, the secrecy surrounding the program has fueled speculation for decades. The Soviets also experimented with beluga whales and seals exploring which species were best suited for deep water and Arctic operations.
Bottlenose dolphins ultimately proved the most adaptable for base defense and mine detection roles, mirroring the American experience. When the Soviet Union dissolved in 1991, the Sevastopol facility fell under Ukrainian control and funding declined sharply. Some animals were reportedly sold and the program's future appeared uncertain. After Russia annexed Crimea in 2014, control of the base returned to Moscow. Russian officials announced renewed marine mammal training efforts and satellite imagery since then has suggested continued activity at the facility.
The Navy's Marine Mammal Program ultimately proved more durable and operationally more effective than its Soviet counterpart. Consistent funding, advanced behavioral training methods, and long-term program continuity allowed the Navy to refine dolphin capabilities over decades. This experience transformed the program from experimental research into a reliable asset used in mine countermeasures, harbor defense, and equipment recovery. Bob Olds, a former Marine Mammal Program official, described their effectiveness directly, saying, "They're really good at finding stuff. Probably their most impressive capability is finding objects that are completely buried beneath the seafloor."
This allowed dolphins to locate mines and other underwater threats that mechanical systems often failed to detect. Lieutenant Josh Frey of the US 5th Fleet emphasized the same advantage during mine-clearing operations. The capability that mammals bring to demining efforts is that they have a very sophisticated form of biological sonar. This natural detection ability allowed dolphins to operate in environments where human divers and electronic systems were limited. Today, dolphins remain in active service protecting naval bases and strategic assets from underwater threats. One of their most sensitive assignments is Naval Base Kitsap in Washington, home to more than 2,000 nuclear warheads.
Dolphins patrol the surrounding waters, trained to detect intruders and underwater explosives before they can reach submarines or critical infrastructure. A single undetected diver or explosive device could have catastrophic consequences. Military dolphin deployments continue beyond the United States. Satellite imagery analyzed in 2022 showed Russian dolphin units positioned at the Sevastopol naval base following the sinking of the cruiser Moskva during the war in Ukraine. Dolphins remain an effective defense against underwater sabotage capable of detecting threats that machines and human divers may miss. Despite advances in robotics and autonomous underwater vehicles, dolphins continue to provide a reliable detection
capability in shallow cluttered environments. Their role has evolved, but their purpose remains the same. To protect ships, naval bases, and strategic assets from hidden underwater threats. But the program has faced criticism from animal rights groups who argue that military use of dolphins raises ethical concerns. The Navy maintains that the animals receive extensive veterinary care and live in structured environments designed to ensure their health and safety. Today, the US Navy continues to maintain a marine mammal force of dolphins and sea lions based in San Diego. After more than six decades, the program still exists for one reason. Dolphins can detect underwater threats that machines cannot reliably find.
From Cold War experiments to modern nuclear base protection, military dolphins have remained part of naval defense. Nearly invisible beneath the surface, they continue to perform missions that began in secrecy and remain relevant in the present day. Thank you for watching this episode of Forgotten History. If you like what you saw, please click like, share, and subscribe. And if you would like to assist with the ever-increasing cost of production, please consider becoming a channel member and joining our Patreon page.
