The Maritime Administration (Marad) posted an advisory Sept. 22 that multiple instances of significant GPS interference have been reported worldwide in the maritime domain. This interference is resulting in lost or inaccurate GPS signals affecting bridge navigation, GPS-based timing, and communications equipment.
Satellite communications equipment may also be impacted. Over the last year, areas from which multiple instances have been reported include the eastern and central Mediterranean Sea,...
https://www.workboat.com/news/government/marad-posts-advisory-on-gps-interference/