More than 30 Iranian naval vessels have been sunk or destroyed since strikes began on 28 February, according to CENTCOM figures confirmed by Admiral Brad Cooper. Iran's surface fleet before the war comprised approximately 65 operational vessels. Half are now gone. The confirmed losses include the IRIS Shahid Bagheri drone carrier, the IRIS Dena — sunk by a US submarine torpedo south of Sri Lanka, the first American torpedo kill since 1945 — and the IRIS Shahid Sayyad Shirazi and an unnamed Jamaran-class corvette, both filmed ablaze at their berths in Chah Bahar. The IRIS Bushehr, the Dena's sister ship, is now interned in Sri Lanka. Two drone carriers confirmed destroyed. The number of individually identified vessels — by name, class, or visual confirmation — now approaches a dozen. The gap between that figure and the Pentagon's 30+ claim remains unverified, though the scale of strikes on port infrastructure makes high totals plausible.
The toll has escalated from the 20 warships Defence Secretary Hegseth claimed on Day 5, a figure that drew scepticism because only the IRIS Dena had been independently verified at that point. The last time a state navy suffered losses of this magnitude in this compressed a timeframe was arguably the Second World War itself. In the 1982 Falklands War, Argentina lost approximately six vessels over 74 days. Iran has lost more than 30 in seven. In Operation Praying Mantis in April 1988 — the last direct US-Iran naval confrontation — Iran lost two frigates.
What has been destroyed is three decades of conventional naval modernisation. Iran began building indigenous frigates and corvettes in the early 2000s, part of a broader effort to develop a navy capable of contesting The Persian Gulf beyond the IRGC Navy's traditional small-boat swarming tactics. The Moudge-class frigates, Jamaran-class corvettes, and the drone carriers represented Tehran's attempt to operate as a conventional naval power. That programme is now functionally over. Iran's remaining maritime capability defaults to what the IRGC Navy was originally designed for when it was established during the Iran-Iraq War: fast attack craft, mines, and coastal anti-ship missiles — asymmetric tools for area denial rather than power projection. The conventional capabilities destroyed this week took three decades to build. The posture Iran reverts to is the one it started with in 1980.
