(www.MaritimeCyprus.com) Modern maritime operations depend heavily on Global Navigation Satellite Systems (GNSS), whether GPS, Galileo or GLONASS. From open-ocean routing to precise harbour manoeuvres, satellite-based positioning data is deeply embedded in ship systems, port logistics, traffic monitoring and safety infrastructure.
This reliance, however, has created a growing vulnerability. Incidents of GPS jamming and spoofing, once a military concern, now increasingly affect merchant ships at sea and near ports. Without proactive preparation and mitigation, interference with satellite navigation threatens vessel safety, global trade efficiency, port operations and maritime security.
To support crews facing these incidents, the International Chamber of Shipping (ICS) and its members produced the Navigating in Areas of Unreliable Satellite Signals poster.
This aide‑mémoire helps bridge officers identify the signs of compromised satellite signals and recommends best practice actions to maintain safe navigation.
Gregor Stevens, ICS Nautical Director said:
“The safety of our seafarers, ships, and the environment is critical. With ever increasing frequency of jamming and spoofing of GPS, this new free resource helps seafarers recognise the warning signs and provides guidance on navigating these waters safely.”
You can download the ICS poster by clicking below:
Source: ICS
