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U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation
MSCI Advisory

2023-014-Eastern Mediterranean Sea-Regional Conflict


1. Reference: None

2. Issue: In light of current tensions and hostilities in the Eastern Mediterranean, there is an increased risk to commercial vessels operating in the region.

3. Guidance: Vessels operating in the Eastern Mediterranean are advised to exercise caution; conduct a risk assessment; review security measures; review current NATO Shipping Centre and coastal broadcast warnings; and incorporate appropriate protective measures into their vessel security plans. Vessels should ensure AIS is transmitting at all times (except when the master believes that continuing to operate AIS might compromise the safety or security of the ship) consistent with provisions of the International Convention for Safety of Life at Sea (SOLAS) and monitor VHF Channel 16.

In the event of any incident or suspicious activity, U.S.-flagged commercial vessels should immediately notify the NATO Shipping Centre (NSC), the U.S. Coast Guard National Response Center (NRC) and activate the Ship Security Alert System. Request the 6th Fleet Naval Cooperation and Guidance for Shipping (NCAGS) detachment be copied on any incident report submitted to the NSC or NRC. U.S.-flagged commercial vessels are encouraged to participate in the NSC’s Mediterranean Voluntary Reporting Scheme. Reporting entails contacting the NATO Shipping Centre when entering or departing the Mediterranean Sea and/or departing a port in the Mediterranean Sea. The preferred reporting method is online using the “Mediterranean Reporting Scheme – Format A” link at Alternatively, the forms can be downloaded, filled in, and submitted by email to the NATO Shipping Centre.

In accordance with 33 CFR 101.305, all suspicious activities, breaches of security, and transportation security incident events must be reported to the U.S. Coast Guard National Response Center.

U.S. mariners in this area are advised to consult Department of State Travel Advisories at: All American citizens abroad should inform the nearest U.S. embassy or consulate of their plans to transit the area and/or update their information via the Smart Traveler Enrollment Program (STEP) at:

4. Contact Information:
a) NATO Shipping Centre: or +44 (0) 1923-956-574. NSC Advisories and warnings can be found at

b) U.S. Coast Guard National Response Center: +1-800-424-8802 or
c) U.S. 6th Fleet Naval Cooperation and Guidance for Shipping (NCAGS) Detachment; or +39 081 568 3612.
d) For maritime industry questions about this advisory, contact Supplemental information may also be found on the MARAD Office of Maritime Security website at:
e) For more information about U.S. Maritime Alerts and Advisories, including subscription details, please visit

5. Cancellation: This message will automatically expire on April 23, 2024.