Maritime Flash Report - 25NM South of Galle, Sri Lanka

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Flash Report

Thursday 05 March 2026

Attack - 25NM South of Galle, Sri Lanka

Dear Client,
Please find below our most recent Flash Report. If you have any queries about our reports please contact us at africaops@castorvali.com.

Incident Details

Incident Date & Time:

04 March 2026, 00:01 UTC

Location:

25NM South of Galle, Sri Lanka

Latitude/Longitude:

5° 35' 54.00" N, 80° 13' 42.00" E

Vessel Type, Name, Flag, and Status:

Iranian Naval Warship, IRIS DENA

Incident Type:

Attack

Crew status

87 fatalities

Incident Details

Description

The Iranian Naval Warship IRIS DENA was attacked and sunk approximately 25NM south of Galle, Sri Lanka. The vessel made a distress call following what has been described as a submarine attack. Sri Lanka's Navy and Air Force launched a rescue operation in response to the distress signal. There were 180 crew members onboard. At the time of writing, there were 87 fatalities and dozens missing.

Key findings

This incident represents a concerning escalation in naval warfare tactics, with the use of submarine-launched weapons against a surface warship in international waters near Sri Lankan territory - outside of the immediate conflict zone around Iran. The US has indicated that a torpedo sank the ship.

Recommendations

Shipping operators should treat the wider northern Indian Ocean as a heightened risk environment, not only the Gulf.
Closely monitor NAVAREA warnings, UKMTO alerts, and other intelligence feeds.
Maintain enhanced bridge watchkeeping and radar monitoring.
Report suspicious activity to UKMTO / MSCHOA where applicable.

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