A U.S. Navy MQ-4C Triton surveillance drone disappeared abruptly and unexpectedly from online flight tracking sites after declaring an in-flight emergency while flying over the Persian Gulf on April 9.
The unmanned aircraft was also tracked rapidly losing altitude right beforehand, prompting widespread questions about its fate.
Online flight tracking data shows the MQ-4C had just completed a roughly three-hour-long flight over the Persian Gulf and the Strait of Hormuz and appeared to be returning to base at Naval Air Station Sigonella in Italy. The Triton had just crossed into Saudi Arabian airspace before making a sudden turn to the northeast in the direction of Iran. Available data also shows the drone rapidly descended from a typical cruising altitude of around 50,000 feet down to below 10,000 feet.
The MQ-4C’s transponder was broadcasting (or “squawking”) the code 7700, which is a general declaration of an in-flight emergency, at the time. The code, by itself, does not offer any indication of what that the emergency might be or how serious the situation is. There are also unconfirmed reports that the Triton initially sent out another code, 7400, which is used to declare a loss of connectivity between a drone and its controllers on the ground.
The MQ-4C had otherwise been publicly visible online from the moment it left Naval Air Station Sigonella in Italy. Tritons have been flying sorties over the Middle East, as well as other locales, from Sigonella regularly since 2024.
An MQ-4C Triton in front of a hangar at Naval Air Station Sigonella in Italy in 2024. USN
As of 2025, the Navy had 20 of these drones in service in total, with plans to acquire seven more. The service received funding to purchase the final pair of drones in Fiscal Year 2024, at which time the estimated unit cost for each one was pegged at just over $238 million.
When reached for more information by TWZ, the office of the Chief of Information (CHINFO), the U.S. Navy’s main public affairs office, declined to comment. We have also reached out to the U.S. Navy’s regional commands in the Middle East and Europe, as well as U.S. Central Command (CENTCOM).
At the time of writing, there does not appear to be any official comment about the MQ-4C from Iranian authorities.
Source: The War Zone