you can use a 5'6" rod for dock shootin, some do from what I've read. I've got some 4'6" and 5' ers that I use for DS. some of the more experienced DS's use 6' and longer depending on the situation. If a 6' is flexible enough and the right action, they use it. A good (IMO) DS rod is the Shakespear 4'6" UL from walmart.