The Safety Advantage


A MoorGuard protected line can not be overloaded


MoorGuard fuses create a safer, reduced risk workplace that minimizes human error.

 Permanent Protection

Unlike mechanical safety measures and brakes a MoorGuard fuse never needs maintenance or adjustment. A MoorGuard fuse is ready 24/7 to provide maximum safety performance. MoorGuard offers a positive, permanent solution to potential line parting injuries.

Warning TimeOpenwater - full Extension

MoorGuard prevents line overload while providing precious time to correct an unsafe situation. Compared to other safety systems or anti-snapback mooring lines a MoorGuard fuse provides more than ten times the warning. Warnings can be audible, visual or both.

The image to the right shows the extremely long elongation of the MoorGuard fuse. The link below shows the extraordinary stretch of a MoorGuard fuse:

8 : 1 elongation provides precious time


Pre-Determined Safety Level

You decide the safety factor and MoorGuard delivers the safety performance. As a fuse added to existing lines a Moorguard fuse can be changed if the safety situation changes without having to replace the line.

Watch a MoorGuard fuse hold steady at 20,000 pounds in this demonstration 


Safely Increase Line CapacityLoad 2Load 1

With the ability to engineer the exact activation level, synthetic lines can safely be used at higher load levels either increasing their capacity or allowing line sizes to be reduced.

Buy knowing the exact release point, mooring system designers can safely create a system to account for UV damage, physical wear and tear, twists, bends or other strength reducing parameters.


How it works – an explanation of line reduction calculations


Reducing line size reduces handling injuries such as strains and sprains. Easier handling can also mean a reduction in personnel requirements reducing the number of hands involved in dangerous activities.

When paired with a MoorGuard fuse the smaller line to the right can do the same job as the larger line without a fuse.

Danger Level Warning

The speed of fuse 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.


Mark X StopPhysical changes in the fuse indicate overload. Other more active visual cues can be added to increase the warning potential such as a jacket that opens exposing the red fuse when overloaded.


Load Balancing and Mooring Facility ProtectionBroken bollards

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.

Port owners can protect their facilities by providing MoorGuard fuses for their bollards preventing bollard overload and failure (see video to right) and helping prevent breakaways that could cause greater damage to surrounding facilities.


Line ProtectionWire 2

MoorGuard saves lines as well as lives.

Pairing a MoorGuard fuse rated at 40% of the break strength of a polyester line or 30% of a wire line will eliminate cyclic loading damage and significantly increase line life as the chart to the right demonstrates.

Simple to Use – Eliminates Human ErrorKONICA MINOLTA DIGITAL CAMERA

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.

Once 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.


Load and Vessel Security

By holding the load at a pre-determined, secure level after activation the MoorGuard fuse prevents collateral damage caused by loosing control of a vessel or tow.

Reduce or Potentially Eliminate Snapback

If pulled to ultimate collapse the soft failure mechanism of a MoorGuard fuse helps prevent sudden line snapback, demonstrated in the link below:

MoorGuard protected Polypropylene line can be safer than an unprotected UHMWPE line


The Savings Advantage

Reduced Injuries

Reducing Snapback means reduced injuries from parted lines, less equipment damage and hopefully no more fatalities. These all add up to lower insurance rates and higher productivity from less lost time cases.

Reduced Line Size

In some cases the size of the mooring line can be reduced.  Even slight size reductions can yield big savings in new line cost, ease of handling, deck efficiency and reduced handling injuries such as strains and sprains.

If line size is not reduced the MoorGuard fuse will allow the operator to use more of the rope’s capacity or, if load levels are kept below the cyclic damage level, to increase the service life saving money by increasing replacement cycle times.

Longer Line Life

Large saving can be realized by increasing the useful life of mooring lines.  By preventing overloading, shock loads and the effects of cyclic loading MoorGuard may more than double line life.

If polyester or polypropylene synthetic lines or wire lines are kept below 33% of their MBL line life can be increased 10x.

Under normal circumstances the life of mooring tails can be extended from 18 months to several years. This can save an average vessel a quarter million dollars over the life of the mooring tails.

Eliminate Line Damaging Events

Shock Loads 

Shock loading can reduce normal line break to 55% of MBL. MoorGuard eliminates shock loads.  The fiber in MoorGuard can absorb an instantaneous shock of at least 5x the MEL.


Twisting reduces line strength especially for high modulus fibers. Torsion on a plaited rope of 2 turns per meter reduces efficiency by 30%. MoorGuard fuses are unaffected by twisting and during high torsion events will twist and release torsional tension from the system.

Drum Compression

By preventing overloading drum compression is reduced. High modulus lines are especially subject to axial compression damage.