The MQ-4 Triton was flying a patrol mission over the Persian Gulf, before signaling through the transponder a loss of the communication link with the pilot and initiating a descent.
A U.S. Navy MQ-4C Triton Unmanned Aerial System (UAS) disappeared from flight tracking websites over the Persian Gulf on Apr. 9, 2026. Shortly before disappearing, the aircraft squawked 7400, the transponder code indicating a loss of the communication link with the remote pilot.
The Triton, which was on its way back to Naval Air Station Sigonella, Italy, initiated a descent from its cruise altitude at 52,000 ft to 9,500 ft, where the signal was lost. The descent lasted just under 15 minutes.
#USNAVY United States Navy – 🚨 7700 General Emergency
Northrop Grumman MQ-4C Triton 1x#AE7815 169804 – Unknown C/S
A US Navy MQ-4 drone operating over the Persian Gulf and Strait of Hormuz has declared an emergency en route back to Sigonella Naval Station.
At 0956z it made a… pic.twitter.com/xbqvrOby2t
— Armchair Admiral 🇬🇧 (@ArmchairAdml) April 9, 2026
Before disappearing, the squawk reportedly switched to 7700, which is the code for a general emergency. In the last phase of the descent, the drone also appeared headed towards Iran.
An official statement is currently not available and, at this stage, it is unclear what happened. Observers appear to agree that the drone might have crashed in the Persian Gulf.
A U.S. Navy MQ-4C “Triton” high-altitude, long-endurance maritime reconnaissance drone appears to have descended into the Persian Gulf after squawking 7400 (communications link loss) and then 7700 (general emergency) while it was returning to Naval Air Station Sigonella, Italy,… pic.twitter.com/3E4i0yTZsa
— OSINTdefender (@sentdefender) April 9, 2026
U.S. forces have lost a number of drones during operations in Iran, with at least 16 MQ-9 Reapers. However, it is still early to determine whether the Triton was hit by Iran.
This is a developing story, it will be updated when new details emerge.
