some where on here I posted some pictures of side scan under docks, they were ok, but you won't get much detail, best way to fish docks is to fish them all, start in one place and work your way to the end of the line, somewhere you will find fish, and once you do, they will most likely always be there, work it over pick it apart, also look of tell tail signs on the docks, cleaning station, wire or small string going straight down in a slip, rod holders, little things you would put out for your catching pleasure, someone else is probably doing the same thing.