With fenders deployed, it is OK to make contact with the dock without damaging the boat. Lines can be deployed if the fenders are deployed. The lines work as follows: To deploy a spring line, first click on a bumper/fender, and then click on the cleat. To remove a spring line, just click on the bumper/fender. Using the shifters, throttles or thrusters, move the boat so that the boat is against the dock. At this point, the boat will not move until the lines are released. When the line color is black, the line is slack and has no impact on the boat’s movement. When the line color is red, the line is taut and will have an impact on the boat’s movement.
To shorten a slack line, click on the bumper/fender and start the process all over again: To deploy a spring line, first click on a bumper/fender, and then click on the cleat.