The Dangers of Ro-Ro Vehicle Decks
The maritime industry has witnessed a concerning pattern of safety incidents involving moving traffic on Roll-on/Roll-off (Ro-Ro) vessel decks, highlighting persistent vulnerabilities in cargo operations that continue to pose significant risks to crew members and passengers.
The UK's Marine Accident Investigation Branch (MAIB) published their final report into the accidental crushing of a crew member aboard a Ro-Ro vessel whilst the vessel was engaged in cargo operations. This tragic incident follows a disturbing spate of similar incidents that have occurred in recent years, demonstrating the continued and evolving dangers that may be posed to crew and passengers moving around on vehicle decks during loading and unloading operations.
The frequency of such incidents underscores fundamental challenges within the Ro-Ro ferry industry, where the pressure to maintain tight schedules and maximise cargo capacity often conflicts with optimal safety practices. These vessels handle millions of passengers and vehicles annually across hundreds of routes. The inherent nature of Ro-Ro operations, involving the movement of large, heavy vehicles in confined spaces with limited visibility, creates an environment where even minor procedural lapses can result in significant consequences.
Incident Analysis
Initial Circumstances and Operational Context
The incident occurred shortly after loading operations had commenced on both the main and upper vehicle decks of the vessel during a routine cargo handling procedure. The bosun, representing the most experienced deck crew member present, was assigned responsibility for coordinating loading operations on the upper vehicle deck and was assisted by two ordinary seamen. This crew configuration, while seemingly adequate, would later prove insufficient for maintaining comprehensive safety oversight across the complex loading operation.
The loading sequence followed standard industry practice, commencing operations from the stern of the deck and progressively moving forward toward the accommodation area. This approach allows for systematic cargo placement and theoretically provides better control over traffic flow. However, as operations progressed, the confined nature of the deck space and the increasing density of positioned vehicles began to create increasingly challenging working conditions for the crew.
To position each semi-trailer in their designated stowage position on the deck, a qualified banksman was required to guide each tractor unit through the precise maneuvering necessary for optimal cargo placement. This role was appropriately designated to the most senior crew member present on the loading deck, which in this case was the Bosun. The banksman's responsibilities extend far beyond simple traffic direction; they must maintain comprehensive situational awareness, communicate effectively with multiple drivers simultaneously, anticipate potential hazards, and ensure that each vehicle movement always occurs within established safety limits.
The banksman role requires exceptionally close coordination between the signaling crew member and each tractor unit driver, demanding that both parties maintain continuous visual contact throughout every aspect of the maneuvering operation. This requirement becomes particularly critical during reversing operations, where the driver's natural field of vision is severely restricted, and trailer positioning demands precise spatial awareness. Such operations are repeated numerous times during any given cargo loading sequence, with each repetition carrying inherent risks that must be actively managed.
As the loading operation progressed according to established procedures, at some stage during the evolution the Bosun moved into a hazardous position within a corner space that was enclosed on three sides by fixed structures. This positioning fundamentally compromised his safety by eliminating escape routes that would normally allow crew members to quickly move clear of approaching danger. The decision to occupy such a confined space represented a critical departure from basic safety principles, though the circumstances that led to this positioning remain complex.
Operational reports indicated that no empty traffic lanes were available in the immediate vicinity, severely limiting the Bosun's ability to monitor the ongoing vehicle movements from a position of safety. This constraint forced him into a compromised working position where he found himself directly in the path of an approaching semi-trailer with minimal options for rapid egress. The absence of alternative positioning options highlights fundamental challenges in Ro-Ro deck design and operational planning.
As the tractor unit commenced its reversing maneuver, the driver lost visual contact with the bosun while navigating the complex spatial requirements of trailer positioning. The Bosun's precise movements and decision-making process during this critical period could not be definitively determined through subsequent investigation. However, witnesses reported observing him gesturing directions to the tractor unit driver approximately thirty seconds prior to the incident, suggesting he was actively attempting to fulfill his banksman duties despite being in a compromised position.
The sequence culminated when the Bosun was fatally crushed between the vessel's bulkhead structure and the reversing semi-trailer unit, representing a catastrophic failure of multiple safety systems and procedures designed to prevent exactly such occurrences.
Contributing Factors: A Comprehensive Analysis
Inadequate Supervision and Monitoring
The MAIB investigation identified multiple contributing factors that combined to create the conditions leading to this tragic accident. Perhaps most significantly, during the critical process of maneuvering the semi-trailer into its designated stowage position, the Bosun was not being actively monitored by any other crew member during such high-risk operations.
This breakdown in supervisory protocols occurred because the available crew members were simultaneously engaged in other essential operations, with one crew member focused on securing a previously positioned semi-trailer and another actively marshaling an additional semi-trailer to its stowage position. The competing demands of multiple simultaneous operations created gaps in safety coverage that proved fatal.
Compounding this resource limitation, no closed-circuit television (CCTV) coverage was available to monitor the specific area where the incident occurred. The vessel's officers, who might otherwise have provided supervisory oversight, were necessarily engaged with other operations on the vessel or managing loading activities on the vessel's main vehicle deck, further reducing available safety oversight.
Conflicting Responsibilities and Role Confusion
Investigation revealed that the Bosun faced significant conflicts between his various assigned responsibilities, being simultaneously tasked with supervising overall safety operations, acting as banksman for vehicle positioning, securing cargo as a lasher, and maintaining general supervisory oversight of deck operations. This multiplicity of roles created an inherent contradiction where the senior crew member responsible for safety oversight was required to engage in hands-on activities that prevented him from maintaining the detached observational position necessary for effective safety supervision.
This situation indicated a fundamental absence of appropriate oversight of vehicle deck operations, given that the most senior and experienced crew member was necessarily involved in direct operational activities rather than remaining in a predominantly supervisory capacity where he could maintain comprehensive situation awareness and intervene when safety protocols were compromised.
Infrastructure and Procedural Deficiencies
At the time of the incident, the Bosun was positioned on a painted deck area that had been designated as an unofficial walkway. This marking had been created by the crew as an attempt to prevent vehicles from parking too close to the longitudinal bulkhead, representing an informal safety measure developed through operational experience. However, the vessel lacked specific documented procedures for the safe utilization of such walkways, creating ambiguity regarding their appropriate use and safety limitations.
The investigation concluded that this painted walkway may have created a false sense of security for the Bosun, potentially leading him to underestimate the risks associated with his positioning while semi-trailers were being maneuvered in the adjacent space. Critically, no physical barriers or separation devices existed between the designated walkway and the active vehicle lanes, leaving crew members completely dependent on procedural compliance and driver awareness for protection against collision with moving vehicles.
Communication System Failures
A significant procedural issue was identified in the working practices surrounding the use of whistles as communication devices during deck operations. The investigation revealed that whistles were being relied upon as a primary method of crew protection, rather than as a supplementary communication tool supporting other safety measures.
Additional concerns were raised regarding whether the whistles themselves provided sufficient audible warning capability in the complex and loud environment of active cargo operations, where engine noise, hydraulic systems, and multiple simultaneous conversations create significant background sound levels. The effectiveness of whistle signals in such conditions remains questionable without additional supporting safety measures.
For whistle communication systems to function effectively, they must operate in conjunction with other precautionary practices, most importantly the maintenance of continuous visual contact between banksmen and vehicle drivers. The breakdown of this integrated approach created dangerous gaps in communication and situational awareness. Investigation evidence suggested that the Bosun activated his whistle only once immediately prior to being struck by the semi-trailer, indicating either a failure to recognize the developing danger or an inability to communicate effectively with the driver.
Driver Conduct and Training Issues
A major contributing factor identified through investigation was the inappropriate conduct and inadequate training of tractor unit drivers operating on the vessel. The report documented that drivers had developed a normalized practice of losing visual contact with banksmen during maneuvering operations, accepting this dangerous condition as routine rather than recognizing it as a critical safety failure requiring immediate corrective action.
This normalization of deviant practice had led to an expectation that trailer positioning maneuvers should continue even in the absence of proper communication and visual contact with the banksman. The investigation revealed that the driver involved in the incident had continued maneuvering the semi-trailer into position without stopping when visual contact was lost, operating under the dangerous assumption that the Bosun would maintain personal responsibility for avoiding danger rather than recognizing the shared nature of safety responsibilities.
This approach represents a fundamental misunderstanding of safety principles in confined space operations, where all parties must actively participate in hazard recognition and risk mitigation rather than assuming that others will compensate for safety system failures.
Safety Recommendations: Comprehensive Risk Management
Pre-Operational Risk Assessment Protocols
Fundamental to every cargo operation on vehicle decks is the absolute necessity to perform comprehensive operational risk assessments before any cargo loading or discharge activities commence. These assessments must systematically identify all hazards present on the vehicle deck at the time of operations, determine which personnel might be at risk from each identified hazard, evaluate the probability and potential severity of each risk, and establish necessary precautionary measures to minimize risks to acceptable levels.
Vehicle decks represent one of the most hazardous environments on Ro-Ro vessels, serving as the source of numerous types of accidents including vehicle collisions with services and structural obstructions, hazards associated with vehicle breakdowns and emergency jump-start procedures, accidents resulting from inadequate training of drivers and signaling personnel, incidents involving unsafe loading and transportation of materials on vehicles, injuries caused by cargo lashing equipment that may spring back when applied, tightened, released, or loosened, falls from height when working near unprotected edges such as lift shafts, voids, deck openings and internal ship ladders, and most critically, vehicles or their loads striking personnel, particularly during reversing operations when people are positioned in locations where drivers cannot maintain visual contact.
Engineering Controls and Physical Infrastructure
The management of risks posed by moving vehicles on vehicle decks demands addressing both fundamental design limitations of existing vessel infrastructure and implementing practical solutions to mitigate risks imposed by human error and operational constraints.
Vehicle decks are designed primarily to maximize cargo capacity, accommodating everything from motorcycles and passenger cars to large heavy goods vehicles and specialized transport equipment. Each vehicle type presents vastly different space requirements and operational challenges when attempting to ensure safe loading while maintaining sufficient space for crew and passenger movement throughout the vehicle deck .
Critical infrastructural measures for risk reduction include ensuring adequate maneuvering space, removing unnecessary physical obstacles to reduce complex maneuvering requirements, maintaining comprehensive illumination systems with all overhead lighting in proper working condition, conspicuously marking any physical obstructions that cannot be removed, installing crash barriers and designated protected safety zones for personnel, clearly marking separate lanes for vehicles and pedestrians, restricting unauthorized entry to vehicle decks from accommodation areas, and ensuring all CCTV monitoring systems remain operational throughout cargo operations.
Human Factors and Behavioral Controls
Human factors represent perhaps the most significant consideration in vehicle deck operations, affecting crew members, stevedores, and passengers who are exposed to inherent risks when moving through vehicle deck environments. Strict control of human behavior and movement patterns is essential to minimize risks in areas with high volumes of moving traffic and limited escape routes.
Comprehensive human factors management includes establishing detailed written procedures for crew conduct on vehicle decks, installing appropriate safety signage to continuously remind personnel of present hazards, organizing regular safety campaigns to maintain awareness of vehicle deck dangers, monitoring and controlling crew fatigue through systematic tracking of rest hours and providing routine safety training aligned with company safe operating procedures.
From a passenger management perspective, it should involve maintaining strict control over passenger movements during loading and unloading operations, ensuring passengers are excluded from vehicle decks once vessels proceed to sea, requiring banks-men to maintain constant visual contact with vehicle drivers, and exercising special care when persons unfamiliar with vehicle deck operations require deck access.
Conclusion
The conduct of vehicle deck operations inherently involves significant risks that require comprehensive management through integrated engineering, procedural, and behavioral controls. However, with proper risk mitigation planning and systematic implementation of safety measures, these operations can be conducted safely to ensure the protection of passengers and crew. The tragic incident analyzed demonstrates the catastrophic consequences of safety system failures and emphasizes the critical importance of maintaining robust, redundant safety measures in high-risk maritime operations.
Members seeking further information on similar matters should contact the Club's Loss Prevention Department
This bulletin refers to material produced by the United Kingdom's Marine Accident Investigation Branch that is available under the Open Government License V3.0