Since February, several media outlets—both newspapers and television—have raised concerns about the Week Number Rollover scheduled for April 6, 2019. With alarmist headlines, some even suggest you might need to pull out your paper charts again. So who should we believe? What are the real implications for maritime information systems?

GNSS, GPS… what are we talking about?

On April 10, 2018, the U.S. Department of Homeland Security, and more specifically CERT-ICS, published a memorandum aimed at users of the GNSS (Global Navigation Satellite System), particularly GPS (Global Positioning System).