Date: July 27, 2025
By: All in Maritime News Team
Overview
Russia’s largest and most strategic Baltic port, Ust-Luga, has issued a mandatory order for all inbound vessels to undergo underwater hull inspections, following a series of unexplained and increasingly alarming explosions involving international commercial ships. These incidents—described as “mystery blasts”—have raised major concerns about port security, maritime sabotage, and insurance risk exposure in Russian waters.
The decision, enforced just days ago, is seen as one of the most serious responses by Russian maritime authorities to a growing string of attacks on tankers and gas carriers linked to their ports. The move comes amid an ongoing geopolitical climate marked by heightened tension and shadow conflict in maritime domains, particularly since Russia’s full-scale invasion of Ukraine.
The Catalyst: Explosions on Vessels Linked to Russian Ports
The immediate trigger for this directive was the incident involving the Eco Wizard, a liquefied petroleum gas (LPG) tanker owned by Greece’s StealthGas. On July 6, 2025, while docked at Ust-Luga for cargo operations, the vessel suffered a serious structural breach resulting in the release of ammonia. Divers later confirmed the damage consisted of two distinct, inward-bent holes in the hull—evidence consistent with an external blast or attachment, such as a limpet mine.
Although no casualties were reported, the severity and proximity of the breach to the vessel’s critical systems highlighted a dangerous vulnerability. Eco Wizard was not the first. Several similar incidents had already been logged in 2025:
- The oil tanker Koala, also Greek-owned, reported structural damage off Ust-Luga earlier in the year.
- Another vessel, Vilamoura, was struck by an unexplained blast while sailing the Mediterranean. Investigations later confirmed that the ship had visited a Russian port days prior.
These events share a disturbing pattern: all the affected ships had recently called at Russian or Crimea-linked ports before sustaining underwater damage under unclear circumstances.
The Port Authority Response: Mandatory Inspections
In response to the potential threat of sabotage or covert explosive devices attached to hulls, the Ust-Luga Port Authority—backed by Russia’s Federal Security Service (FSB)—has now mandated comprehensive hull inspections for all vessels prior to berthing.
Key features of this directive include:
- Underwater Inspections:
All vessels approaching Ust-Luga must undergo hull scans either by divers, remotely operated vehicles (ROVs), or hydroacoustic sonar equipment. These inspections focus on high-risk zones such as:- Propeller shafts and rudders
- Sea chests and intake grills
- Thrusters
- Bulbous bows and keel areas
- Security Certification:
Ships will only be cleared for cargo operations once port authorities and FSB marine inspectors verify that no suspicious devices are detected. Without this clearance, entry is denied. - Insurance Verification:
Incoming vessels must show evidence of active Russian-approved P&I (Protection and Indemnity) insurance. This is intended to ensure that any potential incident—be it sabotage, collision, or leak—is covered financially by an insurer aligned with Russia’s port and maritime risk framework. - Presidential Directive:
President Vladimir Putin has reportedly signed a presidential decree requiring every foreign-flagged vessel heading to Russian ports to secure FSB vetting, in addition to customs and immigration approval. The decree is part of a broader framework to control maritime access in view of national security threats.
National Maritime Security Escalation
The Ust-Luga directive is part of a sweeping federal action that extends across Russia’s entire Baltic coastline. The state-owned port operator Rosmorport has launched a RUB 3.16 billion tender (approx. USD 40 million) to appoint underwater service providers across all major ports, including:
- St. Petersburg
- Primorsk
- Vysotsk
- Kaliningrad
- And Ust-Luga itself
Under this scheme, qualified inspection firms will conduct scheduled and emergency hull checks, with the contract window expected to run from mid-August through at least the end of 2026.
Inspection costs are expected to range between RUB 578,000 to 2.8 million per vessel (approximately USD 7,400 to 35,700), depending on the ship’s type, size, and complexity.
Security Threat Analysis
While the Russian government has not officially named any perpetrators, naval security analysts and Western intelligence circles suggest the incidents are likely the work of covert underwater sabotage teams. The following observations support that theory:
- Blast pattern analysis indicates deliberate attachment of devices in sensitive areas, often near engine rooms or ammonia tanks.
- Damage has typically occurred after departure from Russian ports, suggesting devices were planted while docked.
- Most affected vessels were Greek- or Cypriot-owned tankers—a pattern possibly linked to those companies’ continued trade with Russia amid global sanctions.
Some experts believe Ukrainian operatives could be involved, pointing to a trend of increasingly sophisticated maritime strikes against Russian interests. Others posit the involvement of private contractors or opposition groups using advanced underwater drones or diver-deployed mines.
Notably, no group has claimed responsibility for any of the explosions, and no conclusive evidence has surfaced publicly tying the incidents to a specific actor.
Impact on Shipping and Trade
The implications of these developments are substantial:
- Delays in Cargo Operations:
Hull inspections may add 6 to 48 hours to turnaround times for ships, depending on availability of inspection teams, weather, and vessel size. - Higher Freight and Insurance Costs:
War risk premiums and port-related surcharges have already increased for vessels heading to or coming from Russian Baltic ports. - Increased Operational Complexity:
Vessel operators must now factor in inspection delays, additional paperwork, and increased security briefings before transiting Russian waters. - Reputational and Commercial Risk:
Some charterers, particularly in the EU and Middle East, are reportedly avoiding contracts involving Russian port calls due to the unknown risks and insurance complications.
Industry Reaction
- Greek and Cypriot shipping companies, many of whom operate LPG and crude tankers, are now conducting voluntary pre-arrival inspections and rerouting vessels where possible.
- Ship management firms are advising clients to maintain erratic transit schedules to reduce predictability and minimize exposure to planned attacks.
- Global marine insurers are tightening underwriting standards for voyages linked to Ust-Luga and nearby ports, requiring stricter due diligence and real-time location sharing.
- Risk consultancies are now ranking Ust-Luga in the same tier of port risk as conflict-adjacent ports in Libya and Yemen.
Conclusion: A Turning Point for Maritime Security in the Baltic
The mandatory hull inspection policy at Ust-Luga is the clearest sign yet that Russia views these recent blasts as more than coincidental. While no firm conclusions have been publicly drawn, the port’s decision marks a major escalation in its maritime security posture.
As a vital export point for Russian crude, fertilizers, coal, and gas condensates, any disruption at Ust-Luga has ripple effects across Europe’s energy supply chain, Baltic shipping lanes, and global commodity markets.
For now, shipowners, masters, and charterers must operate with heightened vigilance, recalibrating routes and expectations. Ust-Luga, once a relatively quiet logistics hub, is now at the center of a widening maritime mystery—one with very real commercial, operational, and geopolitical consequences.
