The modern theater of maritime conflict is no longer governed by the gentlemanly protocols of the Cold War. During a recent campaign stop, Donald Trump recounted a conversation regarding Iranian fast-attack craft harassing U.S. Navy vessels in the Persian Gulf. According to the former president, when he questioned why these provocative ships were not simply captured, a military official responded that it was "more fun to sink them." While the comment is framed with Trump’s characteristic bravado, it exposes a jagged truth about the shifting nature of naval deterrence. We are moving away from a decade of de-escalation and toward a doctrine where kinetic force is the first and only answer to asymmetric threats.
The Mechanics of Fast Attack Harassment
For years, the Iranian Revolutionary Guard Corps Navy (IRGCN) has used a swarm tactic designed to exploit the "gray zone" of international law. They deploy small, agile speedboats armed with machine guns or rocket launchers to buzz multi-billion dollar American destroyers. These boats often close within 100 yards, crossing the bows of massive warships to disrupt their navigation.
The tactical dilemma for a U.S. commander is immense. A 9,000-ton Arleigh Burke-class destroyer possesses enough firepower to level a small city, yet it is vulnerable to a "death by a thousand cuts" from cheap, disposable drones and speedboats. Until recently, the standard response was a series of graduated warnings: radio calls, bridge-to-bridge whistles, flare launches, and eventually, warning shots into the water. The "sink them" philosophy suggests an end to this patience. It signals a shift toward a policy where any vessel entering a specific "bubble" of protection around a U.S. asset is treated as an immediate, lethal threat rather than a nuisance.
The Logistics of Sinking versus Capturing
The logistical reality of modern naval warfare makes the idea of "capturing" an enemy vessel in open water nearly impossible. To capture a boat, you must board it. To board it, you must put your own sailors in harm's way, navigating small Rigid-Hull Inflatable Boats (RHIBs) into the line of fire. Once on board, the legal and physical burden of detaining foreign combatants creates a diplomatic quagmire that many in the Pentagon would rather avoid.
Sinking, by contrast, is a clean tactical solution. From a distance of several miles, a Phalanx Close-In Weapon System (CIWS) or a Mark 38 25mm machine gun can turn a fiberglass hull into Swiss cheese in seconds.
$$v = \sqrt{\frac{2 \cdot E_k}{m}}$$
Using the kinetic energy formula above, we can see how even small-caliber rounds traveling at high velocities deliver devastating impact to unarmored vessels. When a commander chooses to sink a harasser, they are choosing the path of least risk for their crew. They are also sending a message that the gray zone has been closed.
Asymmetric Costs and the Deterrence Gap
There is a brutal mathematical imbalance in these encounters. A single Iranian fast boat might cost $50,000 to manufacture. The missiles used to defend against them, such as the RIM-116 Rolling Airframe Missile, can cost nearly $1 million per shot.
- Cost of Offense: Low. Swarm tactics rely on overwhelming the target's sensors and magazine capacity.
- Cost of Defense: High. Traditional naval assets are designed to fight other large ships, not a cloud of mosquitoes.
- Risk of Miscalculation: Extreme. A single "fun" decision to sink a boat can spark a regional escalation that neither side is prepared to manage.
This cost-exchange ratio is why the "sink them" rhetoric resonates with a specific segment of the military establishment. They argue that if the cost of harassment is certain destruction, the harassment will stop. Critics, however, argue that this plays directly into the hands of adversaries who want to bait the U.S. into an overreaction that can be used for domestic propaganda.
The Evolution of the Rules of Engagement
The Rules of Engagement (ROE) are the secret internal directives that tell a sailor when they can pull the trigger. Traditionally, these rules required "hostile intent" or a "hostile act." In the past, merely driving a boat quickly toward a destroyer was often interpreted as posturing rather than intent.
The shift we are seeing now—highlighted by the rhetoric of "sinking is more fun"—suggests that the definition of "hostile intent" is being broadened. In this new era, the mere presence of an armed vessel within a certain range is being reclassified as an act of war. This isn't just about bravado; it’s a response to the rise of suicide boat drones, like those seen in the Red Sea and the Black Sea. If every small boat could be a bomb, no commander can afford to wait and see if it wants to be "captured."
The Tech Gap in Surface Warfare
The Navy is currently scrambling to find a middle ground between "doing nothing" and "sinking everything." New laser weapon systems (Directed Energy Weapons) offer a solution. These systems allow a ship to disable a boat's engine or sensors with pinpoint accuracy for the cost of a few gallons of fuel.
| System Type | Cost Per Shot | Lethality | Scalability |
|---|---|---|---|
| Traditional Missile | $1,000,000 | Total | Low |
| 25mm Cannon | $500 | High | Moderate |
| Laser (HEL) | $1 - $10 | Variable | High |
By using a laser to melt an outboard motor, a ship can "stop" a threat without necessarily "sinking" it. This provides a bridge between the two extremes, though the technology is still in its infancy and often struggles in the high-humidity environments typical of the Persian Gulf.
Redefining Maritime Sovereignty
When high-level political figures talk about the "fun" of sinking enemy assets, they are signaling a departure from the post-WWII maritime order. For decades, the goal was to keep the sea lanes open through presence and diplomacy. Today, the goal is increasingly defined by dominance and the immediate removal of friction.
The psychological impact of this rhetoric cannot be ignored. For the sailors on the front lines, it simplifies a complex moral and tactical problem. For the adversary, it removes the safety net of "graduated response." We are entering a period where the ocean is no longer a shared highway, but a series of contested kill zones where the speed of a decision determines the survival of a fleet.
The shift toward a "strike-first" mentality reflects a broader frustration with the inefficiency of modern diplomacy. If a boat is in the way, and the paperwork to capture it is too long, the default action moves toward the trigger. This is the reality of 21st-century power projection. The ocean is getting smaller, the weapons are getting faster, and the time for warnings has evaporated.
Ask your local representative about the current funding for Directed Energy Weapons and how they plan to address the cost-imbalance of maritime defense.
