The Minesweeper Gap

On March 10, 2026, the heavy-lift cargo vessel M/V Seaway Hawk eased into the Delaware River and docked in Philadelphia. Strapped to her deck were four warships: USS Sentry, USS Devastator, USS Gladiator, USS Dextrous. Fiberglass-hulled, wooden-keeled mine countermeasures ships — the last of the Avenger class, the US Navy’s only dedicated minesweepers. They were bound for the scrapyard.

That same day, 7,000 miles east, the US reported that Iranian Revolutionary Guard small craft had begun dropping mines into the Strait of Hormuz. France’s Macron said he had “no confirmation” from French or partner intelligence services. Approximately a dozen mines — out of Iran’s estimated 2,000-6,000 stockpile — were assessed as deployed. No vessel has been confirmed struck by a mine; all actual ship attacks used projectiles and explosive-laden boats.

The ships that were built to find and kill those mines were sitting on a barge in Pennsylvania.

Four Wooden Ships and a Freight Barge

The Avenger class was a Cold War artifact that never stopped being essential. Fourteen ships, built between 1987 and 1994, with fiberglass-sheathed wooden hulls — non-magnetic, because operating inside a minefield in a steel-hulled ship is suicide. Magnetic-influence mines detonate when they sense ferrous metal. The Avengers were designed to be invisible to the weapons they hunted.

Four of them — Sentry (MCM-3), Devastator (MCM-6), Gladiator (MCM-11), and Dextrous (MCM-13) — had been forward-deployed to Naval Support Activity Bahrain since 2012. Dextrous had been in the Persian Gulf continuously since August 1997. Twenty-eight years of patrolling the most minable chokepoint on Earth.

On September 3, 2025, the Navy decommissioned Dextrous. Gladiator followed around September 12. Sentry around September 24. On September 25, Vice Admiral George Wikoff presided over the decommissioning of Devastator — the last Avenger. The ceremony was solemn. The press releases were polished. And the most dangerous waterway in the world was left without a single purpose-built minesweeper for the first time in over three decades.

Three months earlier, on June 22, 2025, the United States had bombed Iran’s nuclear facilities in Operation Midnight Hammer.

The Promise That Was Going to Fix Everything

The Littoral Combat Ship was the future. Modular. Agile. Transformational. One hull, swappable mission packages — surface warfare, anti-submarine, mine countermeasures. Plug in the MCM module and your littoral combat ship becomes a minesweeper. Plug in the ASW module and it hunts submarines. The Navy called it a revolution.

The MCM Mission Package would carry the AN/AQS-20C towed sonar, an Unmanned Influence Sweep System, the Knifefish unmanned underwater vehicle, and airborne laser mine detection via MH-60S Seahawks. It was supposed to be ready before the legacy minesweepers retired.

It was not ready.

A decade. The LCS MCM program began development around 2004. Initial Operational Capability was supposed to arrive before the Avengers retired. Instead, it arrived in May 2023 — after the retirement timeline was already locked in. The first operational deployment didn’t happen until March 2025, six months before the last Avenger decommissioned. That deployment reached Bahrain in May 2025, giving the Navy exactly four months of overlap between the old capability and its unproven replacement.

As of March 2026, three Independence-class LCS operate from Bahrain with MCM packages: USS Canberra (LCS-30), USS Tulsa (LCS-16), and USS Santa Barbara (LCS-32). Not one of them has ever cleared a real mine in operational conditions. Their testing was conducted against “threat-representative mine surrogates.” The LCS platform itself has been so troubled that the Navy has been decommissioning ships less than ten years old — some Freedom-class hulls were scrapped less than three years after commissioning.

Meanwhile, the Navy’s other MCM leg — the MH-53E Sea Dragon helicopter — has only 28 aircraft remaining, is out of production, and is being retired entirely by 2027.

Both legs of America’s mine countermeasures capability are being cut simultaneously.

Thirty Years of Warnings, Filed and Forgotten

This is the part that turns institutional failure into something closer to institutional negligence. Because nobody can claim they weren’t told.

That was 2015. The most authoritative testing body in the Department of Defense — the office Congress created specifically to prevent the military from fielding systems that don’t work — issued an unambiguous verdict. Not operationally effective. Not operationally suitable. In combat.

The Navy’s own professional journal, USNI Proceedings, published warning after warning:

That title — “Practice Now or Pay Later” — reads differently in March 2026 than it did in July 2021.

The warnings were not obscure or classified. They were published in the Navy’s own journal, by active-duty and retired officers, with full institutional awareness:

• 1996: GAO found MCM research and development underfunded and poorly organized (GAO NSIAD-96-104).
• 1998: GAO found the Navy hadn’t decided what mix of MCM forces it wanted (GAO NSIAD-98-135).
• 2008: GAO documented challenges transitioning from legacy to new MCM systems (GAO-08-13).
• 2018: DOD Inspector General found the Navy declared IOC for MCM systems “prior to demonstrating that the systems were effective and suitable for their intended operational uses.”
• 2019: USNI Proceedings: “Don’t Kill the Navy Mine Countermeasures Triad.”
• 2023: USNI Proceedings explicitly recommended keeping the Avengers as “a stop-gap measure until more concrete solutions are fielded.”
• 2024: USNI Proceedings: “The Navy Must Fix Mine Warfare’s Institutional Structure.”
• 2024: USNI Proceedings: “That the Navy is not ready to meet the defensive mine warfare challenge is no secret."

Thirty years. GAO, CBO, CRS, DOT&E, DOD Inspector General, USNI Proceedings, active-duty flag officers, retired vice chairmen of the Joint Chiefs. Everyone who looked at this problem reached the same conclusion. The Navy kept filing the reports and decommissioning the ships.

The Timeline

The Consequences Materializing in Real Time

On March 10, 2026, Reuters reported that the US Navy had been refusing “near-daily requests from the shipping industry for military escorts through the Strait of Hormuz since the start of the war on Iran, saying the risk of attacks is too high for now."

The risk is too high because mine countermeasures operations require sailing at low speeds in predictable patterns — making both the MCM vessels and escorted ships sitting targets for Iran’s shore-based anti-ship missiles, drones, and fast attack craft. Without the ability to clear lanes first, escort is suicide.

Iran doesn’t need to close the Strait of Hormuz. It just needs to make insurers believe the strait might be closed. The Royal United Services Institute laid out the mechanism with clinical precision:

By March 11, the US had sunk 16 Iranian mine-laying vessels — though CENTCOM’s own video showed most struck while moored, raising questions about whether they were actively mining. CNN reported Iran “still maintains upward of 80% to 90% of its small boats and minelayers.” Iran’s estimated mine stockpile — 2,000 to 6,000 weapons — has barely been dented. Three merchant ships have been hit by direct IRGC attack (projectiles and explosive-laden boats — not confirmed mine strikes). The insurance markets are doing the rest.

A note on sourcing: US intelligence reports approximately a dozen mines deployed. France says it has “no confirmation.” No vessel has been confirmed struck by a mine. The actual ship attacks have all been direct IRGC action. This does not diminish the editorial’s core argument — the minesweeper gap is real regardless of whether 12 or zero mines are in the water today. The Navy retired the capability to deal with the threat, and the threat environment has materialized. But intellectual honesty requires noting that “Iran is mining Hormuz” carries varying confidence levels depending on whose intelligence you trust.

The Same War, Over and Over

The US Navy has been here before. Every time, it acts surprised.

Wonsan, 1950. Soviet mines delayed a major amphibious landing by eight days. Rear Admiral Allan Smith’s assessment entered the lexicon of naval failure:

Persian Gulf, 1988. USS Samuel B. Roberts struck an Iranian M-08 mine — a 1908-vintage Russian contact mine. The frigate nearly sank. Ten sailors were injured. The United States retaliated with Operation Praying Mantis, the largest US naval engagement since World War II, sinking or damaging half of Iran’s operational navy. The mine that started it cost a few hundred dollars. It was designed before the First World War.

Kuwait, 1991. Iraqi mines damaged USS Tripoli and USS Princeton on the same day. Coalition mine countermeasures operations proved to be a critical bottleneck for the entire ground campaign.

USNI Proceedings identified the pattern in 2021: “The Navy has historically treated mine warfare as a ‘lesser included’ mission… Despite decades of warnings, mine warfare investment has consistently fallen below the funding line.”

In 2026, the pattern completes another cycle.

The Question — and the Assessment

Three hypotheses explain how the Navy retired its minesweepers and then started a mine war.

Bureaucratic disconnect. The MCM retirement was embedded in budget planning since at least FY2022. Pentagon budget processes are siloed — shipbuilding plans operate on different timelines than operational planning. Nobody connected the decommissioning schedule to Iran contingency planning. Partially supported by evidence. The retirement predated the current conflict. But the failure to halt it after Midnight Hammer represents a failure of cross-functional planning that cannot be explained by process alone.

Deliberate risk acceptance. Someone knew about the gap, assessed Iran wouldn’t mine effectively, and accepted the risk. Three LCS with MCM packages were in theater by late 2025. Events have at minimum partially falsified the risk assessment. The US reports Iranian mining — France is less certain — the Navy IS refusing escort requests, and merchant ships ARE being struck by IRGC direct attacks. Whether or not all mining claims are confirmed, the mine threat itself is sufficient to paralyze operations.

Replacement confidence. The Navy convinced itself the LCS MCM was ready because it needed it to be ready. The Avengers were scheduled for retirement and there was no budget or political will to keep them. The IOC achievement in 2023 provided institutional cover. This is the most likely primary driver — but it amounts to institutional wishful thinking validated by a testing regime that never encountered real mines.

The assessment [LIKELY]: a combination of bureaucratic momentum, overconfidence in unproven technology, and institutional negligence. The decision to retire the Avengers was made years ago and never revisited — not when DOT&E said the replacement didn’t work, not when USNI Proceedings published article after article saying the Navy wasn’t ready, not when GAO issued its third decade of warnings, and not when the United States bombed Iran’s nuclear sites three months before the last decommissioning ceremony.

The most damning fact is not that the ships were retired. It is that they were retired in September 2025 — after the Navy had already conducted major combat operations against the country most likely to mine the Strait of Hormuz. At that point, Iranian retaliation including mining should have been an active CENTCOM planning assumption. Either it was and the decommissioning proceeded anyway, or it wasn’t and CENTCOM’s planning failed at a fundamental level.

Either answer is unacceptable.