Disruptions to satellite navigation signals have affected hundreds of vessels operating in waters around the Gulf and the Gulf of Oman, leaving many ships unable to accurately determine their location. According to experts, around 1,000 cargo ships, oil tankers and other vessels have experienced interruptions to their navigation systems during the ongoing regional tensions. Analysts say this figure represents nearly half of the ships operating in the area at certain times, with the majority located near the coasts of the United Arab Emirates and Oman. Specialists attribute the disruption largely to signal jamming that interferes with satellite based navigation systems used by ships for positioning and route planning.
Satellite navigation works through a network of orbiting satellites that transmit timing signals to receivers on Earth, enabling devices to calculate their precise position. Modern smartphones often receive signals from several global navigation satellite systems including the United States Global Positioning System, the European Galileo network, Russia’s GLONASS and China’s BeiDou. These devices typically use multiple signal frequencies, allowing them to maintain accurate positioning even if one signal is disrupted. However, many commercial ships still rely primarily on an older civilian Global Positioning System signal known as the L1 Coarse Acquisition signal, which has been in use since the early 1990s. According to Todd Humphreys of University of Texas at Austin, this reliance on a single signal leaves ships more vulnerable to interference when satellite signals are jammed or disrupted.
Experts explain that interfering with satellite navigation signals does not necessarily require complex equipment. Author and researcher Katherine Dunn notes that jamming can occur when another radio transmitter broadcasts on the same frequency but with greater signal strength. This interference effectively overwhelms the legitimate satellite signal and prevents receivers from calculating accurate positions. A more advanced form of interference known as spoofing can also occur. In spoofing incidents, false location data is transmitted to navigation systems, which may cause a vessel to appear to be in an incorrect location. This can affect the Automatic Identification System used by ships to transmit their identity, destination and coordinates to nearby vessels and monitoring authorities. As a result, affected ships might appear to be positioned on land or in entirely different locations.
Satellite navigation signals play a critical role beyond simple location tracking. They also help synchronize onboard clocks, support radar operations and contribute to speed measurement systems used by vessels at sea. Without reliable satellite navigation, crews must depend on older methods such as radar readings or visual landmarks to determine their position. Maritime specialists say that while these techniques remain useful, the scale and size of modern cargo vessels make electronic navigation systems essential for safe operation. The disruptions occurring in Gulf waters highlight how heavily global shipping now depends on satellite navigation technology and how vulnerable these systems can become during periods of regional conflict or defensive signal interference.
Follow the SPIN IDG WhatsApp Channel for updates across the Smart Pakistan Insights Network covering all of Pakistan’s technology ecosystem.
