martes, 12 de mayo de 2026

LIFEBOATS ON MERCHANT AND OFFSHORE VESSELS

Architecture, SOLAS/LSA Regulations, Survival, Maritime Medicine and Operational Errors

Scientific–Technical Review Updated 2026

By DrRamonReyesMD ⚕️

The images show a closed lifeboat, probably a totally enclosed lifeboat or a free-fall lifeboat, based on the stern-mounted stowage and launching system visible on the vessel. The second image shows the interior of the lifeboat, with longitudinal seating, safety belts or harnesses, and space for collective survival. The Spanish text “lleva agua alimentos” —“it carries water and food”— is broadly correct, but incomplete: a lifeboat is not merely an escape boat. It is an autonomous maritime survival unit, designed to abandon the vessel, move away from danger, protect its occupants and sustain life until rescue.

1. ABBREVIATIONS AND ACRONYMS USED

SOLAS — Safety of Life at Sea: The International Convention for the Safety of Life at Sea. It is the main international legal framework for maritime safety.

LSA Code — International Life-Saving Appliance Code: The International Life-Saving Appliance Code. It establishes technical requirements for the design, approval, testing, maintenance and equipment of life-saving appliances required under SOLAS.

IMO — International Maritime Organization: The United Nations specialised agency responsible for maritime safety, security and prevention of marine pollution.

STCW — Standards of Training, Certification and Watchkeeping for Seafarers: International convention governing the training, certification and watchkeeping standards of seafarers.

PSCRB — Proficiency in Survival Craft and Rescue Boats: Certificate of proficiency for operating survival craft and rescue boats.

MOB — Man Overboard: Emergency situation in which a person falls into the water.

EPIRB — Emergency Position-Indicating Radio Beacon: Emergency beacon that transmits distress and location information.

SART — Search and Rescue Transponder: Radar transponder used to assist search and rescue units in locating a survival craft.

GMDSS — Global Maritime Distress and Safety System: International system for maritime distress alerting and safety communication.

VHF — Very High Frequency: Radio band commonly used for maritime communications.

MARCH: Tactical-medical priority algorithm: Massive bleeding, Airway, Respiration, Circulation, Hypothermia/Head injury.

TQ — Tourniquet: Device used to control life-threatening external extremity haemorrhage.

PFD — Personal Flotation Device: Personal flotation device; commonly called a life jacket.

PPE — Personal Protective Equipment: Protective equipment used to reduce occupational or environmental risk.

2. TECHNICAL CONCEPT

A lifeboat is a survival craft integrated into a vessel’s abandonment system. Its function is to protect crew and passengers from shipboard fire, sinking, explosion, critical list, collision, grounding, chemical contamination, structural failure, offshore emergency or any situation in which remaining aboard the mother vessel becomes impossible.

International regulation is mainly based on SOLAS Chapter III, which addresses life-saving appliances and arrangements, and on the LSA Code, adopted by the IMO Maritime Safety Committee through resolution MSC.48(66).

Operationally, a modern lifeboat must fulfil four essential functions:

float, protect, move away from danger and sustain survival.

3. MAIN TYPES OF LIFEBOATS

3.1. Open lifeboat

Historically common, but it offers limited protection against fire, cold, heavy seas, rain, hydrocarbons, solar radiation and prolonged exposure. Its role in modern regulated vessels is now limited.

3.2. Partially enclosed lifeboat

Used especially in passenger vessels. It provides partial protection but does not offer the same level of thermal, mechanical and environmental isolation as a totally enclosed lifeboat.

3.3. Totally enclosed lifeboat

This is the modern standard on many merchant vessels. It has a rigid hull, enclosed canopy, hatches, ventilation, engine, buoyancy reserve, bilge arrangements, seating, belts or harnesses and signalling equipment. It protects against heavy seas, wind, rain, spray, hypothermia and prolonged exposure.

3.4. Fire-protected lifeboat

Used on tankers, gas carriers, offshore platforms and high-risk units. It may include external sprinkler systems, protected or self-contained air supply for a limited time, thermal protection and a design intended to pass through fire or burning hydrocarbons.

3.5. Free-fall lifeboat

A free-fall lifeboat is launched from an inclined ramp, usually at the stern. The craft falls into the water by gravity and initially moves away from the vessel through kinetic energy. The LSA Code includes specific requirements regarding clearing the vessel after launch and the acceleration forces generated during free-fall launching.

The first image appears compatible with this concept: an external, elevated lifeboat positioned for rapid launching from the stern or upper structure of the vessel.

4. FUNCTIONAL ANATOMY OF A LIFEBOAT

A modern lifeboat integrates a rigid reinforced hull, reserve buoyancy, diesel engine, protected propeller, rudder, batteries, fuel, starting system, ventilation, hatches, seats, harnesses, handholds, lights, signalling equipment, first-aid kit, drinking water, food rations, bailer or bilge system, oars or alternative propulsion aids, rescue line, sea anchor, survival instructions, pyrotechnics and communication equipment.

The second image shows a critical point: occupants must not travel “loose”. They must be seated and secured. In a free-fall lifeboat, incorrect posture, poorly adjusted harnesses or loose objects can cause cervical, lumbar, thoracic, craniofacial or abdominal injuries during hydrodynamic impact.

5. SURVIVAL STORES: WATER, FOOD AND EQUIPMENT

The phrase “it carries water and food” is true but incomplete. A regulatory lifeboat carries survival stores that may include drinking water, food rations, bailing equipment, a first-aid kit, survival instructions, pyrotechnic signals, torch, signalling mirror, whistle, knife, floating line, sea anchor, containers, minor repair equipment and devices to facilitate location and rescue.

From a medical standpoint, water is more critical than food. In real maritime abandonment, early death is rarely caused by hunger. The priority threats are drowning, hypothermia, trauma, shock, dehydration, incapacitating seasickness, solar exposure, burns, smoke inhalation, wound infection and failure of communication or rescue.

6. MARITIME SURVIVAL MEDICINE

6.1. Hypothermia

Hypothermia is a major threat. Even in temperate waters, a wet, immobile person exposed to wind can lose heat rapidly. Inside the lifeboat, occupants should be kept dry, hatches closed when appropriate, evaporation limited, vulnerable people grouped and unnecessary exposure avoided.

6.2. Seasickness, vomiting and dehydration

Seasickness in an enclosed lifeboat may be severe. Vomiting causes water and electrolyte loss, weakness, aspiration risk and deterioration of mental status. Antiemetics, when available and authorised, are operationally important.

6.3. Trauma during abandonment

Injury mechanisms include falls, impacts against internal structures, harness-related injuries, rib fractures, head contusions, cervical sprains, lacerations, crush injuries and launch-related trauma. In free-fall lifeboats, launch is a biomechanical event; it is not simply “getting in and dropping”. Posture, harness discipline and control of loose objects are decisive.

6.4. Burns and smoke inhalation

During onboard fires, occupants may enter the lifeboat with burns, ocular irritation, bronchospasm, smoke inhalation or carbon monoxide poisoning. The lifeboat protects from the external environment but does not replace advanced medical care.

6.5. Contaminated wounds

The maritime environment contaminates wounds with salt water, hydrocarbons, rust, marine bacteria, organic material and industrial residues. Wounds require irrigation, dressing, haemorrhage control, infection surveillance and early medical evacuation when feasible.

7. FREQUENT OPERATIONAL ERRORS

The main conceptual error is believing that a lifeboat is merely “a small boat to leave the ship”. In reality, it is a complex survival system that depends on design, maintenance, training, command and discipline.

Critical errors include: not knowing the muster station, not knowing the assigned lifeboat, boarding without a life jacket when required, failing to close hatches, failing to secure belts or harnesses, bringing loose objects onboard, launching without authorisation, manipulating release systems without training, failing to conduct a headcount, failing to assign command, neglecting casualties, failing to ration water, failing to activate signals, failing to use VHF/GMDSS/EPIRB/SART when appropriate, opening hatches in heavy seas, poor ventilation management and allowing collective panic.

The IMO has recognised lifeboat accidents as a major safety issue and has issued measures to prevent accidents during drills, maintenance, testing and operation of on-load release systems.

8. LAUNCHING SYSTEMS: DAVITS VS FREE-FALL

Davits

Davits lower the lifeboat from the side of the vessel using structural arms, wires and lowering systems. Main hazards include wire failure, hook failure, on-load release failure, swinging, impact against the hull, fall from height and poor maintenance.

Free-fall

A free-fall lifeboat is launched from a ramp. Advantages include speed, initial separation from the vessel, less dependence on wires during descent and usefulness when the ship’s side is compromised. Risks include abrupt acceleration, injury from poor posture, loose objects, poorly adjusted harnesses, incomplete closure, unsecured occupants and inadequate training.

IMO safety guidance for abandon-ship drills using lifeboats emphasises that exercises must follow manufacturer instructions, use appropriate equipment and apply procedures that minimise injury during training and maintenance.

9. INTERNAL DISCIPLINE DURING SURVIVAL

Once in the water, the lifeboat needs command. There should be a coxswain or responsible person, ideally trained under STCW/PSCRB standards. SOLAS requires properly certified personnel for the operation of survival craft and launching appliances according to applicable training standards.

Internal priorities are: headcount, hatch closure, casualty assessment, airway control, haemorrhage control, moving away from the vessel, emergency communication, activation of signals, water rationing, hypothermia prevention, panic control, fuel and battery monitoring, adequate ventilation and preparation for rescue.

10. FIRST-AID KIT AND REAL MEDICAL CAPABILITY

A lifeboat is not an ambulance. Its first-aid kit is usually basic and survival-oriented. It should cover minor haemorrhage control, wound care, dressings, seasickness, minor burns, thermal protection and initial support.

From an operational DrRamonReyesMD perspective, the ideal kit on offshore vessels, high-risk merchant ships or remote routes should additionally include: approved tourniquet (TQ), haemostatic dressing, pressure dressing, thermal blanket, gloves, trauma shears, burn dressings, antiemetic, safe analgesics, oral rehydration solution, triage card, headlamp, compact pulse oximeter when feasible, and a simplified maritime MARCH algorithm: massive bleeding, airway, respiration, circulation and hypothermia.

11. MAINTENANCE AND SAFETY CULTURE

The lifeboat must be ready for immediate use. It is not enough for it to be installed onboard. It must start, release, float, close, communicate, illuminate, remain watertight, contain in-date supplies and be operable by a trained crew.

The IMO has repeatedly emphasised inspection, maintenance, operational testing and servicing of launching and release appliances to reduce lifeboat-related accidents.

12. CRITICAL READING OF THE IMAGES

In the first image, a large external lifeboat is visible, stowed at the stern or upper section of the vessel, with an appearance compatible with a modern launching system. Its elevated position allows hull clearance and rapid escape, but requires rigorous maintenance and realistic training.

In the second image, the interior shows benches or seats, blue safety belts, an enclosed structure and longitudinal layout. This suggests a craft designed for seated and secured occupants. The message “it carries water and food” is correct, but the key survival value lies not only in supplies. It lies in the combination of watertight integrity, buoyancy, thermal protection, internal discipline, communication, signalling and basic medical control.

13. FINAL CONCEPT

A modern lifeboat is a maritime survival capsule. Its value does not lie merely in floating, but in enabling traumatised, wet, seasick, hypothermic, intoxicated or disoriented human beings to survive in a hostile environment until they are located and rescued.

A lifeboat saves lives when five conditions are met: it is well designed, properly maintained, correctly launched, occupied by trained personnel and internally commanded during survival.