DOCK LINES

Posted October 7, 2009.

Dock lines should be made from the best lines you have available, certainly not from the pathetic remains of well used lines, considering the investment the dock lines are meant to protect.









Nylon 3 strand is the preferred material for dock lines because of its ability to stretch up to 20% when subjected to 30% of its rated tensile strength. This elasticity reduces the shock loading on fittings on both the boat and the dock. Double braid Dacron will stretch to only 3% when subjected to 30% of its rated tensile strenth (Page 369-Rigger's Apprentice). This lack of stretch plays HAVOC on the fittings on your boat and dock.



Proper dock lines are like good fences. Both make for good neighbours. Who wants to be tied up next to someone who is just attached to the dock with the equivalent of a few pieces of string??





Note the rubber dock bumper attached to the dock just in case you are coming in too fast (Saves damage to gelcoat, etc.).













































It should be noted that Dacron is less susceptible to chafe than nylon.





What is absolutely the worst material to use is polypropylene as it is very susceptible to ulta-violet degradation from the sun's rays.












Another benefit of using 3 strand is that it is much easier to make eyesplices, backsplices and whippings to complete the line.



























One of the secrets to successful docking is to have the ability to attach one critical line to the boat once it has reached its berth. We accomplish this by having a short line that can be attached quickly to encircle the starboard winch upon arrival. Once this line is on, the boat will stay in close proximity to its dock and the other lines can be attached at your leisure.


Our dock lines are made from 1/2" diameter 3 strand nylon.