Vessels going dark in Port of Quanzhou (Shiyucun), China

Summary:

GPS spoofing impacting shipping has been detected in over 20 Chinese coastal sites during 2019, including the port of Quanzhou (Shiyucun), possibly as a reaction to increased scrutiny of Iranian crude imports by the U.S. One oil terminal was affected by the incident. Ship traffic appeared in a infamous crop circle as a result of spoofing.

Reference URL

https://skytruth.org/2019/12/systematic-gps-manipulation-occuring-at-chinese-oil-terminals-and-government-installations/
https://www.maritime-executive.com/editorials/patterns-of-gps-spoofing-at-chinese-ports
https://www.reuters.com/article/us-usa-iran-china-tankers/u-s-deeply-concerned-about-untrackable-china-ships-carrying-iran-oil-officials-idUSKBN1WV0SE
https://www.mdpi.com/2076-3417/11/11/5015/pdf