By preventing accidental overload and reducing line break forces MoorGuard makes the workplace safer. Nylon, polyester or polypropylene ropes are extremely dangerous and high modulus ropes are only marginally safer.

Dangerous, stored energy is a function of elongation. The high stretch in synthetic ropes make them ideal for mooring but extremely dangerous when they break.

High modulus ropes stretch less and store less energy, 3x less than polyester, but they don’t have enough stretch for mooring. They require the use of a high stretch mooring tail to add elasticity making the breaking behavior similar to other synthetics.

Switching from traditional synthetic ropes to high modulus rope may allow for the use of smaller, lighter ropes but will not prevent snapback injuries or deaths. Scanning and barcoding should always be one of the first features you’d ask for you should have defined what your VMI supply chain is meant to deliver and how it is also supposed to do it.



MoorGuard can extend rope life by preventing shock and cyclic damage. For example, if the cyclic load on a polyester rope is reduced from 80% to 40% its fatigue life increases from 100 cycles to over 1,000,000 – an increase of 10,000% adding years to the life of the line.



Adding a MoorGuard fuse to a nylon, polyester or polypropylene mooring line, in good condition, may allow the ship operator to use smaller lines at a lower safety factor. In some cases the size reduction improves handling efficiency enough to eliminate the need for more expensive, high modulus lines.



MoorGuard uses an innovative, proprietary fiber to prevent a dangerous release of energy by never allowing a mooring line to exceed its safe working load. The AkTiv fiber used in MoorGuard was invented specifically to give a MoorGuard fuse the dual benefits of high elongation and constant resistive force necessary to make a mooring line fuse practical.

Until the invention of AkTiv fiber and the MoorGuard fuse mooring lines have been oversized many times to, hopefully, prevent accidental breakage. Acting like a time delay fuse in an electrical circuit, MoorGuard prevents a mooring line from ever reaching the load point where it will break causing damage, injury or death.



Rope systems are the only mechanical systems in use today that do not have a sacrificial element to prevent damage or injury. MoorGuard is the worlds first “fuse” for rope. The MoorGuard fuse was invented to provide rope systems with a sacrificial component to prevent dangerous overload breakage.

In 1806, within one year of the invention of the light bulb, a patent was filed for the invention of the fuse.  28,000 years after the first records of rope use by man no such safety element existed for rope until the invention of MoorGuard. Like an electrical wire, a rope must be greatly oversized for any project if there is no mechanism to prevent overloading. By adding a fuse in an electrical circuit allows smaller, less expensive wire can be used to do the same work as larger, heavier wire. Likewise, with a  MoorGuard fuse smaller lines can be used because the mooring system can be operated closer to the breaking point, safe in the knowledge that the fuse will activate before the line breaking load is reached.

A MoorGuard protected line can never be overloaded.