
Invisible Hazards on the Mooring Deck: Why Routine Operations Require Expert Marine Auditing
Mooring operations are arguably among the most hazardous routine tasks conducted aboard any vessel. Despite standardisation efforts and modern technological advancements, the dynamic forces at play during berthing continually pose a severe threat to crew members. When procedures are bypassed or risks are improperly assessed, the consequences are often catastrophic.
This reality was starkly highlighted in a recent Marine Accident Investigation Branch (MAIB) report detailing a fatal incident on the mooring deck of a bulk carrier. For Company Safety Officers, HR Directors, and Maritime Training Departments, this tragedy serves as a critical reminder: theoretical safety protocols are entirely insufficient without the practical, rigorous validation provided by comprehensive Marine Auditing.

Incident Overview: The Mona Manx Tragedy
On the morning of 26 August 2021, the second officer of the Isle of Man-registered bulk carrier Mona Manx was fatally injured during a berthing operation at Puerto Ventanas, Chile. While the vessel was manoeuvring, a recoiling mooring line struck the officer.
The line had become entrapped between the vessel and the berth, likely on a fender. As the vessel manoeuvred astern under its own power, the entrapped line suddenly released, recoiling with lethal force. Despite the crew's immediate response, the blunt force trauma sustained by the second officer proved fatal.
Root Cause Analysis: Uncovering the Blind Spots
The MAIB investigation (Report 18/2024) uncovered a cascading series of procedural failures and communication breakdowns that transformed a routine operation into a fatal event:
Positioning in Danger Zones: The investigation concluded that the second officer was struck because he was standing in the danger zone of the tensioned mooring line. It is highly probable that he moved into this hazardous area to obtain an improved view of the mooring line as the vessel manoeuvred.
Procedural Contravention: The Mona Manx was manoeuvred astern using its own engine. This action was in direct contravention of the port's procedures, which prohibited ship running manoeuvres.
Incomplete Master/Pilot Exchange (MPX): The MPX completed before the operation did not include all available information regarding the safe berthing of the vessel. Crucial restrictions, such as the prohibition of engine use while alongside, were not effectively communicated.
Lack of Risk Assessment and Briefing: The vessel's manoeuvre astern with deployed mooring lines was not subjected to a toolbox talk, nor was it risk-assessed by the crew. Consequently, the hazard associated with mooring line recoil was not mitigated.
These findings underscore a dangerous normalisation of risk. This is precisely where engaging expert Marine Safety Consultants becomes a non-negotiable operational necessity. By conducting regular, independent evaluations, operators can identify and rectify these invisible procedural gaps before they result in a casualty.
Regulatory and Operational Implications
The Mona Manx incident exposed vulnerabilities not only on the vessel but also within established safety frameworks. The MAIB noted that the Code of Safe Working Practices for Merchant Seafarers (COSWP) did not adequately address the specific hazards of line entrapment and vertical recoil.
For maritime organisations, relying solely on baseline regulatory compliance is no longer a defensible safety strategy. Proactive safety management requires an elevated approach. By engaging a consultancy that provides an OCIMF SIRE 2.0 Compliant assessment framework, operators ensure that their procedures are evaluated against the absolute highest industry standards, focusing heavily on human factors and real-time operational realities rather than just paperwork.
Furthermore, when near-misses or incidents do occur, conducting a thorough Incident Investigation & Root Cause Analysis is imperative to prevent recurrence. This investigative rigor ensures that systemic failures—such as the poor radio communication and inadequate MPX seen in the Mona Manx case—are permanently engineered out of daily operations.
Key Takeaways: Fortifying Safety Culture

To safeguard personnel and standardise operational excellence, maritime safety leaders must implement the following:
Mandate Comprehensive Toolbox Talks: Every dynamic operation, especially those deviating from standard berthing plans, must be preceded by a targeted briefing.
Redefine Danger Zones: Crews must be trained to understand that danger zones are dynamic. Entrapment and vertical recoil present unpredictable snap-back trajectories that must be actively monitored.
Elevate the Master/Pilot Exchange: The MPX must transition from a tick-box exercise to a robust, two-way dialogue that explicitly covers port-specific restrictions and unique hazards.
Implement Independent Auditing: The most effective way to guarantee Marine compliance and safety is through objective, third-party oversight. External audits provide the "real-time evidence" necessary to identify complacency and procedural drift.
The True Cost of Complacency: Why Proactive Auditing is Non-Negotiable

The true cost of a maritime incident extends far beyond the immediate, devastating loss of human life. For ship owners and operators, a single fatal accident on the mooring deck triggers a cascade of commercial liabilities: crippling operational downtime, multi-million-dollar litigation fees, severe reputational damage, and soaring insurance premiums. Treating safety as a reactive, paper-based exercise is no longer a defensible business strategy; it is a profound financial and moral risk.
As outlined in our core methodology, our tailored services are designed to bridge the perilous gap between documented procedures and deck-level execution. By proactively identifying risk before it manifests into a casualty, we protect your most valuable assets—your crew and your commercial viability—ensuring everyone returns home safely while safeguarding your organisation's operational continuity in an increasingly scrutinised industry.
