Reference: U.S. Maritime Alerts 2018-004A and 2018-004B.
Issue: Multiple instances of significant GPS interference have been reported by vessels and aircraft operating in the Eastern Mediterranean Sea since March 18th, 2018. These reports have been concentrated in the vicinity of Port Said, Egypt and the Suez Canal, and south of the Republic of Cyprus. This interference is resulting in lost or otherwise altered GPS signals affecting bridge navigation, GPS-based timing and communications equipment.
Guidance: Exercise caution when transiting this area. The U.S. Coast Guard Navigation Center (NAVCEN) recently posted information regarding effective navigation practices for vessels experiencing GPS interference. The information reaffirms safe navigation practices when experiencing possible GPS disruption, provides useful details on reporting possible GPS disruption, and is intended to generate further discussions within the maritime community about other disruption mitigation practices and procedures. This guidance also recommends taking note of critical information such as the location (latitude/longitude), date/time, and duration of the outage/disruption, and providing photographs or screen shots of equipment failures during a disruption to facilitate analysis. The NAVCEN information is available at: https://go.usa.gov/xQBaU.
Contact Information: GPS disruptions or anomalies should be immediately reported to the NAVCEN at https://go.usa.gov/xQBaw or via phone at 703-313-5900, 24 hours a day.
Cancellation: This message will automatically expire on November 02, 2018.