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MSCI Advisory

2023-015-Global-Overview of the U.S. Maritime Advisory System.


This advisory cancels U.S. Maritime Advisory 2023-007

1. Issue: This Advisory provides updates to maritime security resources, websites, and information.

2. Guidance: The U.S. Maritime Advisory System website, which contains all current and expired U.S. Maritime Alerts and Advisories, is maintained by the Maritime Administration (MARAD). Upon U.S. Government (USG) clearance of Alerts and Advisories, they are broadcast by the National Geospatial-Intelligence Agency (NGA) and distributed via email. It is important to note these are USG products and are not solely MARAD or NGA authored products. Additional information on this system, including information on participating USG agencies and subscribing, is available at

3. Feedback provided by U.S. commercial maritime stakeholders regarding the U.S. Maritime Advisory System has greatly assisted the USG in pursuing continued enhancements to this system. Feedback to is always welcome.

4. The phone number for the U.S. 6th Fleet Naval Cooperation and Guidance for Shipping (NCAGS) Detachment referenced in Advisory 2023-014 recently changed. The new phone number is +39 081 568 3612.

5. GPS interference in conflict zones and purposeful interference by nation state actors affects maritime navigation in various parts of the world. Mariners are encouraged to report instances of suspected GPS interference to the U.S. Coast Guard Navigation Center through its online reporting form at Mariners can also find additional information related to global GPS interference in U.S. Maritime Advisory 2023-013.

6. The Maritime Industry Cybersecurity Resource Center website at serves as a one-stop-shop for maritime industry stakeholders to find trusted maritime cybersecurity tools and resources, including government points of contact and current industry-focused cybersecurity resources critical to protecting the Marine Transportation System (MTS) from cyber threats. Additionally, information on the importance of multi-factor authentication is available at

7. The U.S. Coast Guard Office of Commercial Vessel Compliance (CG-CVC) announced in the Federal Register in August 2021 the issuance of Revision 8 to Maritime Security (MARSEC) Directive 104–6. U.S. vessel owners and operators needing access to MARSEC Directive 104–6 should contact their local Coast Guard Captain of the Port or District Commander for a copy of Revision 8.

8. The Office of Naval Intelligence (ONI) publishes weekly Worldwide Threat to Shipping (WTS) reports, which provide information on piracy and armed robbery at sea activity, trends, and details of recent incidents. The reports can be found on ONI's "Shipping Threat Reports" website at

9. NGA’s Publication No. 117 (Radio Navigational Aids) provides communications and other important information for mariners. This resource is available at and has been corrected to September 2021 as noted in the preface of the publication.

10. The Office of Foreign Assets Control (OFAC) of the Department of the Treasury administers and enforces economic sanctions based on U.S. foreign policy and national security goals, including those related to specific countries and governments, terrorists, international narcotics traffickers, those engaged in activities related to the proliferation of weapons of mass destruction, and other threats to the national security, foreign policy or economy of the United States. In some cases, these sanctions may affect maritime trade. Maritime industry information on tools to counter current and emerging trends in sanctions evasion related to shipping and associated services can be found at: Additional OFAC sanctions information and notices can be found at: Questions relating to OFAC sanctions may be emailed to: The Department of State has certain authorities to implement a range of nonproliferation, counterterrorism, and Iran-related sanctions, among others, which may affect maritime trade. Information about non-proliferation sanctions can be found at:

11. The U.S. Department of State maintains a list of countries determined by the Secretary of State to have repeatedly provided support for acts of international terrorism. The four main categories of sanctions resulting from designation as a State Sponsor of Terrorism are: restrictions on U.S. foreign assistance; a ban on defense exports and sales; certain controls over exports of dual use items; and miscellaneous financial and other restrictions. The list of countries designated as State Sponsors of Terrorism is available at:

12. U.S. Department of State Travel Advisories discuss safety and security information that should be reviewed by U.S. mariners prior to disembarkation in foreign ports. These travel advisories are available at:

13. U.S. Centers for Disease Control Travel Notices may affect maritime interests, especially during overseas crew changes or passenger embarkation/disembarkation and can be found at: U.S. Maritime Alerts and/or Advisories may occasionally be published to highlight health threats depending on their scope, urgency, and impact, but mariners are advised to become familiar with this web resource and refer to it prior to and while traveling.

14. The Maritime Global Security website at offers industry-issued best practices and guidance to mariners by geographic region and provides contact and subscription information for regional maritime security reporting centers, particularly in high risk-areas.

15. Maritime industry stakeholders who wish to receive U.S. Maritime Alerts and Advisories must self-register by following the subscription instructions at

16. Contact Information: Questions regarding the U.S. Maritime Advisory System may be emailed to the Global Maritime Operational Threat Response Coordination Center at

17. This Advisory will automatically expire on June 19, 2024.