UKMTO are aware of media reports of an Israeli military strike against Iran. Vessels
transiting the Arabian Gulf and Western Indian Ocean may observe increased UAS activity
in the region. There are currently no indications commercial maritime vessels are the
intended target.
Masters are requested to report any suspicious activity, and UAS activity, to UKMTO and
are advised to follow industry guidance on loitering munitions:
https://www.ocimf.org/publications/information-papers/loitering-munitions-%E2%80%93-
the-threat-to-merchant-ships
The security notification is valid for a 72-hour period from time stated. In the event that
increased threat endures past 72-hour period an update will be released.

Source : UKMTO