The Explosive Truth: How Torpedoes Take Down Ships in Modern Naval Drills

The Ultimate Target Practice: Sinking Ships on Purpose

What happens when a navy intentionally sinks a multimillion-dollar warship? It might sound like a disaster, but it’s actually one of the most carefully planned and revealing exercises in modern military training. Imagine a retired vessel—once home to hundreds of sailors—transformed into a floating laboratory for precision weapons and safety protocols. This isn’t a scene from a war movie; it’s a sinking drill, and it’s designed to test everything from torpedo technology to emergency response. By the end of this article, you’ll understand why naval forces choose to send these ships to the bottom on purpose, and what that means for your safety, the environment, and the future of defense.

Why It Matters: Safety, Strategy, and Environmental Concerns

You might wonder why any country would sink its own ships—especially when they cost hundreds of millions of dollars. The answer lies in three critical areas: safety, strategy, and the environment. First, these exercises ensure that torpedoes and other weapons work as intended before they’re used in real conflicts. If a weapon fails during a drill, it’s a learning opportunity; if it fails in battle, lives are lost. This directly affects your safety because effective defense systems protect your nation and its allies.

Second, strategic benefits. Sinking drills help navies refine tactics, train crews, and validate new technologies. For example, the Valiant Shield exercise near Guam focuses on joint operations between the U.S. Navy, Air Force, and Marine Corps. It’s not about preparing for a specific war but about maintaining readiness—a concept that impacts how tax dollars are spent on defense. Understanding these exercises empowers you to evaluate government spending and engage in informed civic discussions.

Third, environmental concerns. Underwater explosions can harm marine ecosystems, so these drills are regulated by strict environmental laws. The navy often monitors coral reefs and wildlife before, during, and after the event to minimize damage. In some cases, old ships are even cleaned of hazardous materials (like asbestos and oil) before sinking, turning them into artificial reefs that benefit marine life. So while it sounds destructive, the process is designed with care—and your interest in ecosystem health is part of the conversation. Safety, strategy, and environment are not afterthoughts; they are the core reasons these exercises exist.

Torpedo Basics: The Sea’s Smartest Hunter

Let’s talk about the star of the show: the torpedo. Think of it as a smart, self-propelled underwater missile—like a drone that hunts with incredible precision. Torpedoes are designed to track and destroy ships or submarines, and they’ve evolved from simple straight-running explosives into sophisticated guided weapons. There are two main types: heavyweight and lightweight. Heavyweight torpedoes (like the U.S. Mark 48) are large, long-range, and used by submarines; lightweight torpedoes (like the Mark 46) are smaller, launched from ships or aircraft, and often used for anti-submarine warfare.

How do they work? A torpedo has four key parts: a propulsion system, a guidance system, a warhead, and a fuse. Propulsion can come from batteries (electric torpedoes) or engines that burn fuel (thermal torpedoes), both of which allow it to travel underwater quietly or at high speeds. The guidance system is where the “smart” part comes in. Some torpedoes are wire-guided—meaning they’re controlled from the launching ship via a thin wire that pays out as it travels. Others use acoustic homing, where they listen for the sound of a target’s engine or propeller and follow it. Modern torpedoes can even switch between guidance modes mid-course, making them incredibly hard to evade.

The warhead is packed with high explosives, but it’s not always designed to hit the hull directly. Many torpedoes use a proximity fuse that detonates the warhead under the target’s keel—the strongest part of the hull—creating a gas bubble that literally lifts and breaks the ship in two. This is why torpedoes are so effective: they exploit the physics of water to maximize damage. In essence, a torpedo is the sea’s smartest hunter, combining speed, stealth, and precision to outsmart its prey.

How It Works: From Launch to Underwater Explosion

Now, let’s walk through the process step by step. Imagine a submarine conducting a sinking drill. First, the target—often a retired warship like the USS Durham—is towed to a designated location in the open ocean, far from shipping lanes and marine protected areas. Environmental surveys are done to check for sensitive habitats, and the ship is stripped of any pollutants.

Next comes launch. The submarine fires a torpedo from a tube using compressed air or a piston system. The torpedo clears the submarine and immediately starts its engine. If it’s wire-guided, a thin wire connects it to the submarine, allowing operators to steer it toward the target. As it travels, acoustic sensors might listen for the target’s noise, or the torpedo may follow a programmed course.

When the torpedo gets close, its guidance system goes active. It might ping the target with sonar (like a bat using echolocation) or lock onto the loudest noise. At the right moment, the fuse triggers the warhead. For an under-keel explosion, the torpedo passes beneath the hull and detonates, creating a massive gas bubble. This bubble rises and expands, lifting the ship and then collapsing, which snaps the keel and splits the hull. The whole event is captured on video for analysis.

After the explosion, the navy monitors the sinking process. The target ship might take minutes or hours to sink, depending on the damage. Often, smaller charges are used to ensure it goes down safely, and divers or remotely operated vehicles inspect the wreck later to study the effects. It’s a precise, data-rich operation—not a chaotic blast.

Real-world Examples: Valiant Shield and the USS Durham Sinking

A concrete example brings this to life. The Valiant Shield exercise, held biennially near Guam, is one of the largest U.S. military drills, involving aircraft carriers, submarines, and thousands of personnel. In 2022, during Valiant Shield, the navy sank the USS Durham, a retired amphibious transport dock ship. This wasn’t random target practice; Durham was subjected to fire from multiple platforms—including torpedoes from submarines, missiles from ships and aircraft, and even attacks from special operations forces.

The goal was to stress-test the ship’s structure and evaluate how different weapons interact. For instance, a torpedo might cause flooding in one compartment, while a missile hit could start a fire. By combining these attacks, the navy learns how ships respond to sustained damage—critical data for designing future vessels and training damage control teams.

Other exercises like RIMPAC (Rim of the Pacific Exercise) also include sinking drills. In 2020, RIMPAC participants sank the former USS Denver using torpedoes, missiles, and even a naval mine. These events are often open to international partners, fostering cooperation and interoperability. For example, a U.S. submarine might fire a Mark 48 torpedo, while an Australian ship provides sonar tracking data.

Environmental studies after such sinks have shown mixed results. In some cases, old ships used as targets became artificial reefs, attracting fish and coral growth. However, there are concerns about unexploded ordnance or hazardous remnants. Still, with careful planning, these drills aim to balance military readiness with ecological responsibility.

Common Misconceptions: Separating Fact from Fiction

Let’s clear up some myths. One common misconception is that torpedoes always detonate on contact with the hull. In reality, many torpedoes are designed to explode under the keel, using a proximity fuse. This causes far more damage than a direct hit, which might only punch a hole.

Another myth is that sinking drills are just fancy target practice with no strategic value. Actually, these exercises provide data on ship survivability, weapon effectiveness, and tactics. They also help train personnel in worst-case scenarios, which saves lives in real conflicts.

Some think torpedoes are outdated in an age of missiles. Not true. Torpedoes are still critical for anti-submarine warfare and sinking surface ships because they exploit water’s density—something missiles can’t replicate. Modern torpedoes are guided, stealthy, and highly effective, especially against submarines.

Also, not all torpedoes are unguided. Early torpedoes did run straight, but since the Cold War, most are wire-guided or acoustic-homing. Finally, Valiant Shield isn’t aimed at any one country; it’s a readiness exercise to ensure the U.S. and its allies can respond to any threat. It’s about capability, not a specific adversary.

What To Explore Next: Torpedoes, Drones, and the Future of Naval Warfare

If this piqued your curiosity, there’s more to discover. One exciting field is autonomous underwater vehicles (AUVs)—robotic subs used for surveillance, mine clearance, and even training. They’re like torpedoes, but without the explosive payload, and they’re changing how navies operate.

Another topic is anti-submarine warfare (ASW), which involves hunting enemy subs using sonar, aircraft, and specialized torpedoes. ASW is a chess game of detection and evasion, and it’s crucial for protecting naval assets. Also, look into environmental impact assessments for military activities—deadly serious but fascinating behind-the-scenes work. From naval mines to international law, the underwater world is full of strategic depth.

Key Takeaways

• Sinking drills are purposeful tests: They evaluate weapons, tactics, and ship survivability, not just destructive target practice.
• Torpedoes are smart weapons: With guidance systems like wire and acoustic homing, they hunt targets with precision.
• Safety and environment are prioritized: Strict protocols minimize risks to personnel and marine life, with some targets becoming artificial reefs.
• Common myths debunked: Torpedoes don’t always hit the hull; they’re not outdated; and drills like Valiant Shield aren’t aimed at a single country.
• Future warfare leans undersea: Autonomous drones and advanced torpedoes will play a growing role in naval strategy.