Iran Air Flight 655

Iran Air Flight 655
Company type	Passenger flight
Industry	Aviation
Headquarters	Tehran, Iran
Products	Passenger air transport

Iran Air Flight 655 was a regularly scheduled passenger service traveling from Tehran to Dubai with a stopover in Bandar Abbas. On 3 July 1988, it was downed by two surface-to-air missiles launched from , a United States Navy vessel. The missiles hit the Iran Air Airbus A300 while it was flying over Iranian territorial waters in the Persian Gulf, shortly after takeoff from Bandar Abbas International Airport. The tragedy resulted in the deaths of all 290 passengers and crew, ranking it among the deadliest airliner shootdowns and the most fatal in Iran’s aviation history.

This event took place amid the nearly eight-year-long Iran–Iraq War. The USS Vincennes had entered Iranian waters following an attack on one of its helicopters by Iranian speedboats. The circumstances surrounding the shootdown remain contentious between Iran and the United States.

According to the US, the Vincennes mistakenly identified the aircraft as an Iranian F-14 fighter jet despite its clear civilian transponder signals. The US Navy maintained that the warship and other vessels attempted multiple communications with the plane on both civilian and military emergency frequencies, but received no reply. Bandar Abbas functioned as a combined civil and military airport, and Flight 655 had departed later than scheduled. Iran accused the US of violating international law recklessly by destroying the plane after provoking Iranian forces. Analysts have pointed to aggressive command choices aboard Vincennes and widespread communication breakdowns as contributing factors.

The initial US response to the incident attracted significant criticism. Although no official apology was made, President Ronald Reagan sent a diplomatic message conveying profound regret to Iran. In 1996, both countries settled their dispute at the International Court of Justice, with the US providing $61.8 million (equivalent to $ million today) as an ex gratia payment to victims’ families, without acknowledging legal responsibility.

Background

By 1984, the conflict had escalated to include aerial assaults on oil tankers and commercial vessels belonging to nations supporting Iraq. In 1987, the Iraqi Air Force mistakenly attacked the US Navy frigate , resulting in 37 fatalities among American sailors. This incident prompted an expansion of US Navy rules of engagement in the Persian Gulf, authorizing warships to engage aircraft preemptively.

Following a US oil tanker’s detonation of a naval mine, additional US warships were deployed; by late 1987, US forces had launched missile strikes against two Iranian fighter jets. In April 1988, Operation Praying Mantis dealt substantial damage to Iranian oil facilities and military installations.

To mitigate threats against shipping, the US Joint Chiefs of Staff issued a 'Notice to Airmen' in September 1987 mandating that civilian aircraft operating in the Persian Gulf monitor distress channels and identify themselves to US Navy vessels; these directives were disputed by Iran.

On the day of the incident, USS Vincennes, along with and , was tasked with escorting ships through the Strait of Hormuz. Commissioned four years earlier, Vincennes was a Ticonderoga-class guided-missile cruiser equipped with the sophisticated Aegis Combat System. Commanded by Captain William C. Rogers III, it had a complement of approximately 400 personnel. The Aegis system allowed simultaneous tracking of numerous targets and facilitated swift information exchange across crew levels. While lacking combat experience, its crew had demonstrated strong performance during training exercises.

The Strait of Hormuz narrows to about 21 nautical miles wide, necessitating that vessels transit through both Iranian and Omani territorial waters. It is routine for naval ships entering or exiting the Persian Gulf to pass through Iranian waters. Throughout the Iran–Iraq War, Iranian forces frequently boarded neutral cargo ships in this strait in search of contraband bound for Iraq—a practice legally justified but one that heightened regional tensions.

Flight and shootdown

The airplane involved, an Airbus A300 bearing the registration , was commanded by Captain Mohsen Rezaian, a seasoned pilot educated in the United States with 7,000 total flight hours, including more than 2,000 hours on the Airbus A300. Both the first officer and the flight engineer each possessed a minimum of 2,000 hours of flying experience.

Flight 655 took off from Bandar Abbas at 10:17 Iran Standard Time (UTC+03:30), departing 27 minutes behind schedule due to an immigration delay. The brief journey, lasting approximately 28 minutes, was routed through commercial air corridor Amber 59, a designated path leading directly to Dubai. The aircraft broadcasted the correct civilian transponder code (mode 3) and maintained communication in English with air traffic control throughout its flight.

On 3 July 1988, the USS Vincennes was navigating the Strait of Hormuz after escorting oil tankers when its helicopter reportedly encountered small arms fire from Iranian patrol boats. In response, Vincennes engaged these vessels and entered Iranian territorial waters during the pursuit. The US Navy ships Sides and Elmer Montgomery were also operating nearby.

Meanwhile, Flight 655 was climbing along its planned route toward the Vincennes. The cruiser mistakenly identified the aircraft as a threat and issued ten radio warnings on military distress channels; additionally, Sides transmitted one challenge on a civilian frequency. Since the airliner lacked equipment for military radio communications, it did not respond. Subsequently, Vincennes prepared to engage. The last transmission from Flight 655 at 10:24:11 confirmed handover from Bandar Abbas controllers:

10:24:07 – Bandar Abbas Approach: "Iran Air 655 roger, contact Tehran Control 133.4, have a nice flight."
10:24:11 – IR655: "Thank you, good day."

At 10:24:22, with the airplane roughly away, Vincennes launched two SM-2MR surface-to-air missiles. The first missile struck at 10:24:43 at , followed shortly by the second missile. The aircraft exploded midair and fragmented into three parts before plunging into the sea. All 290 passengers and crew members lost their lives. Significant portions of the wreckage, including both cockpit voice and flight data recorders, were never retrieved.

At the time of missile deployment, Vincennes was positioned at , within of Iranian territorial waters—a detail later confirmed by US officials including Chairman of the Joint Chiefs Admiral William J. Crowe during an appearance on Nightline.

Radio communication

According to the official International Civil Aviation Organization (ICAO) report, there were eleven attempts to contact Iran Air Flight 655 made by Vincennes and Sides, seven on military channels and four on civilian frequencies. These calls addressed an "unidentified Iranian aircraft," noting a speed of , consistent with radar ground speed readings. However, Flight 655’s crew would have observed indicated airspeed rather than ground speed, potentially causing them to believe these transmissions targeted another aircraft. Both ships attempted communication with Flight 655 across various civilian and military frequencies. The ICAO concluded that the flight crew likely assumed these calls were intended for an Iranian P-3 Orion also departing Bandar Abbas.

It is probable that Flight 655’s crew was monitoring the civilian international air-distress (IAD) frequency at that time. The ICAO determined that American warships lacked equipment capable of receiving civilian air traffic control radio channels; had such capabilities been present, air traffic control communications would have identified the flight clearly. Iran contested this finding by referencing Department of Defense documents indicating that Vincennes possessed VHF radio systems able to monitor civilian frequencies along with other surveillance tools that should have recognized the aircraft. The United States responded by stating that most military vessels were only outfitted to listen to the IAD frequency specifically.

Victims

The flight was carrying a total of 290 individuals, comprising 274 passengers and 16 crew members. Among those on board, 254 were Iranian nationals, 13 hailed from the United Arab Emirates, 10 from India, six from Pakistan, six from Yugoslavia, and one from Italy. Notably, 65 of the passengers were children.

US government accounts

According to official US statements, Flight 655 was detected immediately after takeoff by the USS Vincennes, which identified the aircraft transmitting civilian IFF mode 3 signals. Given that Bandar Abbas airport served both military and civilian flights, all departing aircraft were initially treated as potential threats. Petty Officer Andrew Anderson, responsible for identification, mistakenly interpreted a brief IFF mode 2 signal from an unrelated ground source as coming from Flight 655, leading to its erroneous classification as a military plane using an F-14 fighter’s transponder code. Throughout the flight, however, Flight 655 consistently emitted civilian IFF codes. A combination of slight delays and confusion over time zones caused Anderson to overlook the flight’s presence in commercial air traffic listings.

Tensions escalated when a helicopter launched from Vincennes came under warning fire after approaching Iranian gunboats in breach of US engagement protocols. While engaging these vessels within Iranian territorial waters, Vincennes entered what was described as a "scenario fulfilment" mindset, resulting in false reports that the aircraft was descending on an attack trajectory. Contrarily, data from the Aegis system indicated the plane was ascending beyond 12,000 feet. Although initially acknowledging the aircraft as "possible COMAIR," following misidentification and unanswered radio queries, Vincennes ultimately fired on and downed the airliner.

The Department of Defense first asserted that Vincennes had shot down an Iranian F-14 fighter but retracted this claim hours later upon confirming it was a civilian Airbus. The DoD maintained that the airliner had been mistaken for an attacking fighter jet despite Aegis system records showing a climbing flight path. Additional confusion stemmed from discrepancies between ground speed and airspeed measurements.

In 1992, investigative reporting revealed that Vincennes had been approximately four kilometers inside Iranian territorial waters at the time of the incident—a fact acknowledged in Admiral Fogarty’s formal inquiry. The investigation confirmed Flight 655 followed a standard commercial route and assigned partial responsibility to Iran for flying near active hostilities.

The crew aboard USS Sides, which issued a final radio challenge subsequent to Vincennes, consistently identified Flight 655 as a civilian aircraft and never detected any military IFF Mode 2 signals.

Iranian government account

Iran condemned the shootdown as deliberate and unlawful, dismissing claims of mistaken identity as negligence amounting to an international crime. It emphasized that multiple US warships tracked Flight 655 as a civilian plane operating within recognized air corridors and underscored that Vincennes' crew were trained for high-threat environments. Iran suggested that Vincennes sought justification to employ force, referencing statements by USS Sides commander describing Vincennes aggressive posture.

Iran pointed out prior US Notices to Airmen (NOTAMs) warning aircraft near warships could face defensive action but noted that Flight 655 had been cleared for departure from regional airports and was outside restricted zones when attacked. It challenged assertions that Iranian F-14s carried air-to-ground weapons at the time, arguing that even if true, shooting down a plane within Iranian airspace without radar lock-on contravened international law. Iran stressed that Vincennes entered Iranian territorial waters before missile launch and held the United States accountable under international legal standards regardless of any errors by Flight 655’s crew.

Iran cited previous US condemnations of other shootdowns (such as El Al Flight 402) and referenced US attribution of responsibility to Iraq for attacks on USS Stark under comparable principles. At the United Nations Security Council, Iranian Foreign Minister Ali Akbar Velayati denounced the attack as "the most inhuman military attack in civil aviation history," attributing it to reckless naval forces.

Independent sources

Prior to public acknowledgment of Vincennes' incursion into Iranian waters, legal experts criticized the US refusal to accept liability. Professor Andreas Lowenfeld argued that responsibility arises from causation irrespective of intent or negligence, drawing parallels with Korean Air Lines Flight 007. He also highlighted that compensation paid to Iranian victims was significantly lower than amounts sought from Iraq for damage related to USS Stark.

An article in the Yale Journal of International Law stressed that reasonable errors do not exempt parties from liability for wrongful shootdowns.

A 1992 Newsweek investigation accused Captain Rogers of reckless behavior and alleged a government cover-up; Admiral Crowe denied these allegations.

Analysts characterized deploying an Aegis-equipped cruiser in such a volatile environment as irresponsible, suggesting its advanced capabilities lowered engagement thresholds. The vessel earned the nickname "RoboCruiser" due to its assertive operational stance.

Iran’s case at the International Court of Justice was withdrawn in 1996 following a settlement agreement and compensation payment by the United States.

Three years after the incident, Admiral Crowe publicly admitted on television that Vincennes had been inside Iranian territorial waters during missile firing—contradicting earlier Navy assertions confirmed by ICAO investigations.

The commanding officer of USS Sides criticized Captain Rogers’s aggressive conduct prior to the incident, noting provocative maneuvers against Iranian vessels despite their non-hostile behavior.

Potential factors

The Aegis Combat System software reused tracking numbers displayed on-screen—a design flaw causing confusion when tracking identifiers switched between Flight 655 and a distant fighter jet; this contributed to misinterpretation of threat levels.
Psychological assessments highlighted stress and lack of experience among crew members as factors leading to misreading data.
Crew difficulties identifying commercial flights were exacerbated by darkness in the Combat Information Center and time zone inconsistencies; Flight 655’s delayed departure further complicated tracking efforts.
An Iranian P-3 Orion operated nearby before the attack; some reports suggested it may have affected radar detection or situational awareness.
Command decisions indicated possible intent by Vincennes' crew to provoke confrontation; orders to deploy helicopters close to Iranian vessels may have escalated tensions.
Engagement with Iranian gunboats likely increased stress levels and contributed to errors culminating in the shootdown.

Aftermath

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The event ignited widespread international controversy with substantial criticism directed at the US narrative. In July 1988, Iran called upon the UN Security Council to condemn the United States for committing a criminal act rather than attributing it to an accident. Then-Vice President George H.W. Bush defended the crew’s conduct as appropriate wartime action. The Soviet Union demanded US withdrawal from the region and supported efforts toward ending the Iran–Iraq War; most other council members sided with the US position while noting ignored ceasefire resolutions.

UN Security Council Resolution 616 expressed profound concern over the attack and urged cessation of hostilities.

Within Iran, the incident was perceived as an intentional US strike signaling possible direct involvement alongside Iraq; authorities declared a day of mourning coinciding with American Independence Day.

In February 1996, following resolution at the International Court of Justice, the United States paid $131.8 million in compensation—including $61.8 million allocated for victims—and agreed to provide Iran with two Airbus A300-600 aircraft, marking one of few Western sales since sanctions began in 1980.

While expressing sorrow over loss of life, the United States never issued a formal apology or admitted culpability publicly; President Reagan’s expression of regret was later interpreted by some as an apology but contradicted by Vice President Bush’s refusal to apologize.

The incident cast a long shadow over Iran–US relations for decades and complicated diplomatic initiatives such as negotiations leading up to the Iran Nuclear Deal (JCPOA).

Criticism of US media coverage

Political scientist Robert Entman analyzed differences in American media framing between this event and Korean Air Lines Flight 007 five years earlier: KAL007 was depicted as deliberate sabotage assigning clear blame; coverage of Iran Air Flight 655 framed it as an unfortunate technical error minimizing responsibility while highlighting operational complexities. This framing shaped public perception more strongly against the Soviet Union than against Iran.

In July 2014, commentators drew comparisons between media treatment following Malaysia Airlines Flight 17’s downing over Ukraine versus coverage of Iran Air Flight 655.

Post-tour of duty medals

Despite controversy surrounding shooting down a civilian aircraft, USS Vincennes' crew members received Combat Action Ribbons recognizing service in combat zones; only one officer earned commendations unrelated specifically to this incident. Captain Rogers received the Legion of Merit for overall command performance without mention of Flight 655.

In popular culture

The event was featured in "Mistaken Identity," season three episode (2005) of Canadian television series Mayday. Additionally, Kaveh Akbar’s novel Martyr! (2024) includes a character whose mother perished aboard Flight 655.

Notes and references

Notes

References

Bibliography

External links

Pre-incident photograph of the aircraft at Planepictures.net
Pre-incident image of the plane at the Aviation Safety Network
Comprehensive Investigation Report on the Circumstances Surrounding the Downing of Iran Air Flight 655 on July 3, 1988