USA Banner

Official US Government Icon

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure Site Icon

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Site Notification

Site Notification

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

2018-004B-Port Said, Egypt-GPS Interference


On April 6, 2018, GPS interference was reported in the vicinity of Port Said, Egypt, in position 31-27N, 032-18E.  Separate instances of interference were identified in U.S. Maritime Alert 2018-004A.  The current maritime incident has been confirmed.  The interference is resulting in jammed, lost or otherwise altered GPS signals affecting bridge navigation and other communication equipment.  Exercise caution when transiting this area.  Further updates will be provided when available.  This alert will automatically expire on April 16, 2018.  See U.S. Maritime Advisory 2017-007 and the GPS links at for additional information. Reports of GPS degradations, disruptions, and any other incidents or anomalies can be made via the U.S. Coast Guard Navigation Center at