Synergy Dock Line Stands Up in Tests

Polyester braid with an integral snubber conveniently absorbs shock.


In July 2008, Practical Sailor looked at products for docking, anchoring, or mooring in a storm. Among those mentioned was the Synergy docking line, an abrasion-resistant polyester braid with a short length of industrial-grade rubber in the core. Synergy also makes a stretchy, floating tow-rope for dinghies.

Synergy Dock Line

We put Synergy dock lines into use for six months on a fixed dock and during a two-week Mississippi River delivery cruise. They held up as well as similar braided lines and proved to be more convenient to use than its nearest comparison, a dock line with a rubber snubber. One drawback noted was that the woven cover was more prone to snagging than more tightly braided lines.

In controlled tests, Practicla Sailor applied a 900-pound load to a 10-foot long, half-inch Synergy line ($42.50) and observed about 15 inches of stretch. The line, which has a 9-inch length of rubber in the core, began visibly stretching at loads of about 10 pounds but returned to its original length once the load was released.

We will add the line to an upcoming line-abrasion test. For now, our preferred choice for most docking and mooring duties is good quality, three-strand nylon with chafe gear, a tough team to beat. Check out our used 3-strand nylon rope endurance test here.

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Practical Sailor has been independently testing and reporting on sailboats and sailing gear for more than 45 years. Supported entirely by subscribers, Practical Sailor accepts no advertising. Its independent tests are carried out by experienced sailors and marine industry professionals dedicated to providing objective evaluation and reporting about boats, gear, and the skills required to cross oceans. Practical Sailor is edited by Darrell Nicholson, a long-time liveaboard sailor and trans-Pacific cruiser who has been director of Belvoir Media Group's marine division since 2005. He holds a U.S. Coast Guard 100-ton Master license, has logged tens of thousands of miles in three oceans, and has skippered everything from pilot boats to day charter cats. His weekly blog Inside Practical Sailor offers an inside look at current research and gear tests at Practical Sailor, while his award-winning column,"Rhumb Lines," tracks boating trends and reflects upon the sailing life. He sails a Sparkman & Stephens-designed Yankee 30 out of St. Petersburg, Florida. Darrell is booking speaking engagements in Colorado, Idaho, California, the Pacific Northwest, and British Colombia this summer. You can reach him by email at