Snapback injuries are among the worst industrial accidents in the world. 15% of all snap backs result in death.  Even more in permanent disability or the loss of a limb.  Proper use of a MoorGuard fuse will help prevent a line from exceeding the safe working load and gives extended warning to allow corrective action to prevent dangerous snapback.

Helping to preventing snapback alone is the best reason for installing MoorGuard fuses on all lines but the benefits don’t end there. There are multiple layers to the safety benefits of a MoorGuard fuse.


Redundant Protection

A MoorGuard fuse does more than help protect the mooring line from breaking. It has layers of safety benefits for the operators and equipment.


It activates at a known, pre-determined level chosen to insure no other element in the mooring system will ever reach its minimum breaking point regardless of their physical condition or repair.  If the mechanical condition of equipment is suspect adding a MoorGuard fuse to the system will de-rate the entire system reducing the risk of equipment failure.


It offers multiple visual cues to inform operators that an overload has occurred. In certain models the physical elongation can be observed. In others a jacket or sleeve opens exposing the core material giving an instantaneous, positive indication of overload. In other models the trigger breaks with an audible notice and visual change.


The extremely long stretch of the fuse provides extended safety time to either stop the activity or correct the unsafe condition.


The speed of elongation gives the operator cues to the severity of the overload condition. High overload conditions will cause the fuse to elongate more rapidly. Slight, minimal changes in length indicate the load is at or just slightly above the safe working load.


While stretching the fuse holds the load at the MEL (Minimum Elongation Load). Toward the end of the elongation the fuse becomes marginally stronger to help prevent an early collapse in situations where the load holding capability is critical.

Balances Loads

A vessel with MoorGuard protected lines will equalize loads among the lines preventing a single line from absorbing all the shock and load in case of sudden strains.  This behavior helps prevent cascading line failures and breakaway situations.

Reduce or Potentially Eliminate Snapback

Most importantly, the failure mechanism, the soft collapse, prevents sudden line snapback. Different methods of rope construction and fuse assembly can be engineered to make the final release even softer.


Simple to Use – Eliminates Human Error

Because a MoorGuard fuse never needs calibrating or adjustment another source of human error is removed from the safety system. Routine inspection for physical damage is all that is required.

Installed in the mooring line as either a tail or as an insert between the line and a tail the fuse is always ready to do its job. No special handling is required. If used shoreside, pre-installed on the bollard, the fuse is pulled through the mooring line and dropped over the bollard taking no more time and effort than a normal mooring operation.


Reduced Line Size Reduces Handling Injuries

Because a MoorGuard fuse can be made for any load requirement, every mooring line regardless of material type can be used safely to a lower safety factor.  This means a 6 cm polypropylene line can be used safely instead of a 10cm line, reducing the weight of the line by more than half.  The size and weight reduction helps prevent stress, strain and lifting injuries and may require fewer hands to do the same job.