Originally Posted by ploughboy
Let me suggest we think about this a bit differently. Look at the configuration of the boat in the dock and imagine the tension on the docking lines as the wind comes from all quarters. What do you want the lines to do? My stern lines on my 40 footer are 3/4 inch because of the chafe on the dock cleats and because if the stern moves it could impact my neighbor. My bow lines are 1/2 inch 3 strand ( so what if the bow moves laterally in the dock) and the spring lines holding me off the dock are 5/8 double braid. More than a couple of feet and I'm on the dock. Hope this helps.
on the boat, through all of the tides and wind directions helps. You get a feel for how it moves, both at home, and at other docks. When I got my new cat, which JUST fits the slip, I had to learn new tricks.
Regarding squeaking, using hollow nylon webbing (rock climbing stuff, BlueWater 2" Climb-Spec Tubular Webbing at REI.com
) over the line cuts the squeaking best. My stern line passes right over my berth, making me an expert on silencing line squeak, at least on my boat!