# Heavy GPS Jamming in Strait of Hormuz Puts Tanker Crews and Navies on Edge

*Monday, July 13, 2026 at 6:09 AM UTC — Hamer Intelligence Services Desk*

**Published**: 2026-07-13T06:09:14.825Z (2h ago)
**Category**: conflict | **Region**: Middle East
**Importance**: 7/10
**Sources**: OSINT
**Permalink**: https://hamerintel.com/data/articles/10951.md
**Source**: https://hamerintel.com/summaries

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**Deck**: Reports of severe signal jamming in the Strait of Hormuz surfaced as Iran and the U.S. traded strikes across the region and Gulf states reported air-defence alerts and claimed missile attacks. For tanker crews, navies and insurers, the world’s most sensitive energy chokepoint is now also a live testbed for electronic warfare.

The world’s narrowest major oil artery is contending with a new kind of turbulence. Heavy signal jamming has been reported in the Strait of Hormuz, the congested waterway through which a significant share of global seaborne oil flows, as Iran and the United States exchange strikes across the wider region and Gulf states activate air‑defence alerts.

The reported disruption, described as heavy jamming affecting navigation and communications signals, comes at a moment when radar sites, air bases and potential missile trajectories around the Gulf are under unusual strain. Iranian forces say they have targeted U.S. military infrastructure and long‑range radar systems in Oman, Kuwait and Bahrain, while the U.S. military has acknowledged overnight strikes on dozens of targets inside Iran, including air defence systems, coastal radars, and missile and drone facilities.

Regional alerts reinforced the sense of a contested battlespace. Bahrain sounded sirens due to what authorities described as a threat of Iranian missile or drone attack before later declaring an all‑clear, with early indications that ballistic missiles had been involved in an attack aimed at Sheikh Isa Air Base. There were unconfirmed reports of air‑defence activity and explosions over Abu Dhabi, raising the possibility—though not confirmed—that Iranian missiles or drones could also be targeting vessels or infrastructure near Hormuz.

In this environment, heavy jamming is not an abstract technical issue; it directly affects the ability of ship masters to safely navigate some of the world’s busiest and most politically sensitive waters. Tankers and gas carriers moving through the narrow channel rely on a mix of GPS, radar, Automatic Identification System (AIS) beacons, and visual navigation to avoid collisions and stay clear of restricted zones. Intense electronic interference can degrade or spoof those systems, forcing crews to fall back on less precise methods in confined lanes.

For naval forces, the jamming complicates everything from air‑defence tracking to the coordination of patrols and escorts. Long‑range AN/FPS and maritime radars in Oman and elsewhere help underpin the surveillance picture over Hormuz; Iranian claims that such systems have been hit, combined with observed jamming, suggest an attempt to blind or confuse the sensors that warn of incoming threats. Even where damage to those radars remains unconfirmed, the mere perception that the electronic environment is degraded raises the risk of misidentification and miscalculation.

Commercial operators and insurers look at Hormuz through a different lens: risk pricing. Every new layer of uncertainty—whether from missile launches, unverified strike claims, or signal interference—feeds into decisions over routing, scheduling and premiums. Ships can, in theory, reroute around some dangers by altering timing or hugging certain coasts, but there is no alternative corridor that substitutes for Hormuz. When electronic warfare enters the picture, there is no easy way to sail around it.

Strategically, the jamming is part of a broader contest over information dominance in the Gulf. The U.S. network of radars, satellites and patrol aircraft is designed to monitor missile and drone launches, track ships, and provide early warning to allies. Iran, for its part, has invested in missiles, drones and electronic warfare tools that can probe and, at times, disrupt those systems. The resulting environment is one where tankers and warships are moving through an invisible minefield of spoofed coordinates, jammed signals and contested air‑defence zones.

The broader pattern of Iranian and U.S. activity in recent days—physical strikes on radars and bases, ballistic missile launches, claimed hits on air‑defence systems, and now severe jamming—points toward a multidimensional struggle over who controls the tempo and visibility of any confrontation around Hormuz. Even if neither side seeks a full blockade, the current trajectory makes routine navigation harder and increases the odds of an incident that neither capital explicitly ordered.

Hormuz risk does not need a single dramatic clash to rattle markets or navies; a creeping accumulation of close calls, interference and ambiguous attacks can be just as corrosive. The next indicators to watch will be any confirmed strike on a commercial vessel near the strait, official warnings to shipping from Gulf states or Western navies referencing jamming, and visible changes in tanker routing or insurance rates that would show how seriously operators are taking this latest, invisible threat.