Hormuz Stranglehold: Satellite Imagery Reveals IRGC "Mosquito Fleet" Deployment as Three Ships Struck

This activity comes on the same day that Iranian state media and UKMTO reported IRGC gunboats firing on and seizing vessels in the strait, including the container ships MSC Francesca and Epaminondas (both reportedly seized and being brought to Iran). A third vessel, the Euphoria, was also reportedly attacked and damaged.

IRGCN Fast-Attack Craft Tactics (Mosquito Fleet)

The Islamic Revolutionary Guard Corps Navy (IRGCN) relies heavily on a large fleet of small, high-speed vessels — often called the "mosquito fleet" — as the core of its asymmetric naval strategy in the confined waters of the Persian Gulf and Strait of Hormuz. These fast-attack craft (FAC) are designed for harassment, disruption, and enforcement rather than conventional fleet battles.

Key Characteristics of IRGCN Fast-Attack Craft

• Size and Speed: Small, lightweight boats (often 3–5 crew members) capable of speeds up to 40–60 knots (74–111 km/h). Their shallow draft allows operation in coastal and island areas.
• Armament: Typically equipped with heavy machine guns (e.g., 12.7 mm), unguided rockets, short-range anti-ship missiles, or mine-laying capability. Some carry surveillance gear or support drone operations.
• Numbers: Estimates range from hundreds to over 1,000 operational small boats, many hidden in coastal bases, islands, or underground tunnel facilities for rapid deployment and concealment.
• Advantages: Low radar signature, high maneuverability, cheap and quick to replace. They exploit the narrow geography of the Strait of Hormuz, where larger warships have limited room to maneuver.

Core Tactics: Swarm and Asymmetric Warfare

IRGCN doctrine emphasizes asymmetric (guerrilla-style) naval operations to offset technological superiority of adversaries like the U.S. Navy:

1. Dispersed Swarming: Instead of a single massive wave (vulnerable to air power), modern tactics involve groups of 20+ boats approaching a target from multiple directions simultaneously. This creates saturation attacks that overwhelm sensors, decision-making, and defensive systems. Boats can surround or "herd" larger vessels, disrupting navigation. strausscenter.org
2. Hit-and-Run / HarassmentRapid approach at high speed, quick engagement (machine guns, rockets, or ramming threats), then immediate retreat into coastal shallows or behind islands. This "bite and disappear" approach minimizes exposure to counterfire.
3. Show-of-Force and Enforcement: Large formations (as seen in today's Sentinel-2 imagery of ~33 boats north of the strait near Kargan) demonstrate presence, enforce blockades, or escort seizures of commercial vessels. Recent examples include fast-attack craft used in firing on and boarding ships like MSC Francesca and Epaminondas.
4. Layered Integration: Fast boats rarely operate alone. They coordinate with:

• Naval mines (laid by small craft)
• Unmanned surface vessels or explosive drone boats
• Coastal anti-ship missiles
• UAVs for reconnaissance or strikes

This creates a multi-domain "kill web" in the strait.

Close-Proximity ProvocationHigh-speed approaches toward warships (sometimes from multiple angles, including splitting formations) to test reactions, gather intelligence, or create unsafe situations. Documented incidents show IRGCN boats closing within dangerous ranges with weapons manned.

Strategic Goal in the Strait of Hormuz

The primary objective is disruption of maritime traffic (roughly 20% of global oil passes through the strait) rather than outright destruction of enemy fleets. By raising insurance costs, creating fear, and forcing rerouting, Iran can exert economic and political pressure with relatively low-cost assets, even after losses to larger surface ships and bases.

These tactics have historical roots in the 1980s Tanker War but have evolved toward more dispersed, decentralized operations to reduce vulnerability to airstrikes (e.g., from A-10s or helicopters).

This approach makes the IRGCN a challenging "nuisance" force in littoral waters, where numbers, speed, and terrain favor the defender. Countering it typically requires layered air and surface defenses, persistent surveillance, and rapid-response assets.