One that was deployed already and heading back most likely.....and confirmed:
The last publicly documented port call for IRIS Dena (75) before it was sunk was Visakhapatnam, India, where it participated in the Indian Navy’s MILAN 2026 international fleet review and exercise, which concluded on February 25, 2026. After departing that event, the ship was transiting back toward Iran when it was sunk off Sri Lanka.