IC Brindle Understanding Man Overboard (MOB) Recovery Equipment & Methods (2026 Guide)

The Importance of MOB Recovery Procedures

Recovering a person overboard is one of the most critical emergency operations carried out at sea. When a person falls overboard, the crew must be able to locate, approach, and safely recover the casualty as quickly as possible.

Man overboard (MOB) incidents refer to situations where a person falls into the water and requires immediate recovery and rescue.

International maritime guidance recognises that recovery operations must minimise injury to both the casualty and rescuers. Ships are therefore required to have procedures and equipment ready for these situations.

Under SOLAS Regulation III/17-1, and in many other national codes such as the UK Workboat Code, Commercial Yacht Codes, and the UK Small Sea-going Passenger Ship Codes, all vessels must carry ship-specific plans and procedures for recovering persons from the water, including identifying the equipment used and methods of recovery.

The International Maritime Organisation (IMO) further explains under IMO MSC.1/Circ.1447 that recovery procedures should be designed to safely transfer a person from the water to the vessel while minimising impact with the ship’s side and reducing risk to the crew.

Recovery plans should “facilitate the transfer of persons from the water to the ship while minimising the risk of injury from impact with the ship’s side or other structures, including the recovery appliance itself,” and, where practicable, recovery in a horizontal or near-horizontal position should be provided.

MOB Recovery Strategy Overview

Man overboard recovery is determined by three key factors:

Casualty condition (conscious, injured, unconscious, hypothermic)
Vessel freeboard and access conditions
Available crew and onboard equipment

From this, recovery operations generally fall into three categories:

Assisted recovery (conscious casualty)
Mechanical extraction recovery (restricted access / high freeboard)
Horizontal recovery (injured, unconscious, or high-risk casualty)

Unassisted Recovery (Low Freeboard / Conscious Casualty can Climb)

A Fast Rescue Craft - Using a Rescue Net

Where vessels freeboard is low and conditions allow, a conscious casualty may be able to be unassisted in their own recovery, typically by climbing up a cradle, net or ladder. Where applicable, man overboard equipment, such as a scramble net, cradle or emergency ladder can also enable a conscious casualty to climb aboard even in higher freeboard situations, provided sea conditions, casualty condition, and vessel movement allow a safe and controlled ascent.

This method is common on:

Small workboats
Pilot boats
Rigid inflatable boats (RIBs)
Fishing vessels

Typical equipment used includes:

Recovery poles or boat hooks
Fast Rescue Craft (FRC) MOB Cradles (which can be used to climb if casualty is fit and able or parbuckled if unable)
Scramble nets or climbing nets
Emergency Ladders

These methods allow a conscious casualty to assist with their own recovery, significantly reducing recovery time.

However, un-assisted recovery is not suitable where the casualty is:

injured or immobilised
unconscious or hypothermic
unable to climb due to sea state or vessel freeboard
casualty has been in water more than 30 mins

In such cases, crew may use simple guiding aids such as rescue poles or hooks to assist positioning at the vessel side, or help guide the injured or immobilised casualty into a recovery cradle where assisted recovery onto the deck is required.

Smaller fast rescue craft (FRC) style cradles can be used in low freeboard situations to support and stabilise an incapacitated casualty during recovery, allowing controlled lifting even where freeboard is limited, for example on a RIB or similar small craft.

High Freeboard Man Overboard Recovery

SB Rescue Sling Used from High-Sided Vessel

Where direct boarding is not practical due to high freeboard or vessel layout, mechanical lifting systems are used to recover casualties from the water in a controlled manner. This may involve high-sided rescue equipment such as rescue slings or lifting strops for vertical extraction, or rescue cradles and recovery stretchers for horizontal or near-horizontal recovery, ensuring safe handling and transfer to deck.

This method is common on:

Commercial vessels and ferries
Offshore support vessels
Large pilot boats
Ships with deck freeboards over 2–3 metres

Typical equipment used includes:

Rescue slings and lifting strops
Winches and handy billy systems
Davits and cranes
Recovery harnesses
Larger MOB Cradles
Scramble Nets (if casualty is able to climb)

The casualty is lifted from the water using controlled mechanical force, often with guidance from crew using rescue poles or hooks to assist positioning. This method is used in high freeboard situations where direct access alongside the vessel makes casualty self-recovery impractical, and where vertical lifting systems such as handy-billy systems, winches, and davits—combined with rescue slings or davit-launched rescue stretchers—are required to recover the casualty safely from the water.

If access allows, cradles can also be scaled for higher freeboard vessels, with larger length rescue cradle systems designed for high-sided vessels and large commercial or offshore freeboards.

In suitable configurations where a rescue cradle can be safely fitted and deployed from the vessel side, recovery may be carried out without the need for a davit system, using controlled line handling and parbuckling to bring the casualty aboard in a horizontal or near-horizontal position.

Horizontal Recovery (Preferred Primary Method)

A Recovery Stretcher - Use for Horizontal MOB Rescue

Horizontal recovery systems are generally the preferred method where practicable, as they provide continuous full-body support and significantly reduce the risk of secondary injury or circulatory instability due to 'circumrescue collapse'. This is particularly important in reducing serious complications associated with the recovery of immersion casualties (coldwatersafety.org).

Many immersion-related deaths occur immediately before, during, or after rescue, even when the casualty initially appears stable. For this reason, best practice recommends recovery in a horizontal position wherever possible, with the casualty remaining horizontal for at least 30 minutes after extraction.

Vertical lifting, or allowing a casualty to sit or stand immediately after recovery, can be dangerous and in some cases fatal. This is due to the loss of hydrostatic pressure in the lower limbs, which can cause blood to pool in the legs when upright. As a result, blood return to the heart is reduced, increasing the risk of circulatory collapse, particularly in hypothermic or otherwise compromised casualties.

Horizontal recovery helps maintain more stable circulation during and after rescue, reducing the risk of deterioration following immersion.

This method is widely used on:

Offshore support vessels
Search and rescue vessels
Wind farm support craft
Harbour and pilot vessels

Typical equipment includes:

Rescue cradles
Recovery stretchers
Parbuckling systems
Integrated lifting frames

Traditional horizontal MOB recovery systems maintain the casualty in a horizontal or near-horizontal position throughout the lift, allowing immediate medical assessment and treatment once on deck.

There are also specialist lifting systems designed specifically to support horizontal casualty recovery, such as the Legacy double strop system.

Horizontal systems are particularly effective for:

unconscious casualties
hypothermic casualties
immobilised or injured casualties
situations where crew numbers are limited

To achieve and maintain a horizontal recovery position during extraction, a range of mechanical recovery techniques are used in practice. These systems are designed to support and control the casualty throughout the lift, ensuring body position is maintained during transfer to deck. One of the most effective methods used to achieve this is the parbuckling technique, commonly applied with rescue cradles and scramble nets.

Parbuckling is a commonly used horizontal recovery technique and is described in more detail in the following section:

Parbuckling Method (Horizontal Recovery Technique)

This man overboard lifting technique often incorporates a mechanical advantage system (such as 2:1 rigging), allowing one or two crew members to recover a casualty with reduced physical effort.

A man overboard cradle is typically deployed over the vessel side, and as the casualty is positioned within it, the system is hauled in a controlled rolling motion up the hull.

This provides:

reduced lifting load
continuous horizontal support
controlled recovery with minimal crew
improved casualty stability during lift

This method can be used across both low and high freeboard vessels, with cradle size selected to suit the operating environment. Smaller, fast rescue craft-type cradles are typically used on low freeboard vessels for rapid deployment and quick recovery, whilst larger, extended-length cradle systems are used on high-sided vessels and larger commercial or offshore freeboards where additional reach and support are required.

Vertical Man Overboard Recovery

Vertical lifting systems are used where vessel design or operating conditions prevent safe horizontal or alongside recovery, or where mechanical lifting is required to bring the casualty directly to deck level. They are particularly effective for rapid extraction in situations where it is not possible to manoeuvre the vessel alongside the casualty and can be used either in isolation or in combination with horizontal recovery systems to complete a controlled transfer on board.

Typical vertical lifting MOB systems include:

Rescue slings and strops
Davits and cranes
Winch and lifting systems
Helicopter recovery systems

These systems are effective for extracting casualties from the water where vessel design or sea state prevents safe direct recovery alongside the hull.

Vertical lifting is best understood as an extraction method rather than a final recovery position. It is most effective for lifting a casualty who is still conscious and able to assist, where a rescue sling can be positioned under the arms, or where a lifting strop provides secure vertical support during transfer to deck.

This may be achieved using manual pulley systems attached to the rescue sling or strop, or via powered or mechanical davits, depending on vessel equipment and configuration.

Where equipment design allows, vertical lifting systems may be integrated with horizontal recovery equipment to improve stability and casualty control during transfer.

However, horizontal recovery remains the preferred method where practicable, due to the reduced risk of physiological complications, including rescue collapse (circulatory instability), particularly in hypothermic or otherwise compromised casualties.

That said, while horizontal recovery systems are ideal, vertical lifting still plays an important role. One key advantage is speed, particularly in situations where it is not possible or necessary to manoeuvre the vessel directly alongside the casualty. Vertical recovery systems can be deployed independently for rapid extraction, or used alongside horizontal systems to complete a safe transfer on board.

Key Takeaway for Man Overboard Rescue Equipment

Effective man overboard recovery depends on selecting the correct method based on casualty condition, vessel design, and operational constraints.

Assisted recovery is suitable for conscious casualties on low freeboard vessels where self-recovery is possible using ladders, scramble nets, or similar access equipment
Mechanical extraction is used where vessel freeboard, geometry, or access limitations prevent direct boarding or assisted recovery, typically using slings, winches, or davit systems
Horizontal recovery is the preferred method where practicable due to continuous full-body support and reduced risk of physiological complications during recovery, including rescue collapse and circulatory instability, particularly in hypothermic or injured casualties
Vertical systems are used where direct horizontal recovery cannot be achieved at the point of extraction and may be integrated with horizontal recovery equipment where design allows controlled casualty transfer and improved stability during handling
Supporting equipment such as throwing lines, lifebuoys, rescue poles, stretchers, and hypothermia protection plays a critical role in stabilising the casualty during recovery and preventing further deterioration

All procedures and equipment must comply with SOLAS requirements and IMO MSC.1/Circ.1447 guidance.