You need to start off with back up your trailer to the top of the ramp, and then position yourself. You can ask someone to help you attach the control cables, or you can get out and attach them yourself.Just make sure that they are attached properly, before you go on and do anything else.
Once this is done, you need to check the shaft, and make sure that it is in an upward tilt position, so that things are ready to progress.
Also make sure that the water plug is closed and in place.
Next you need to start backing down the ramp. You should keep going until you see the tires on the trailer start to get submerged in the water.
Now park the car further away, and go on to tie down the straps on the boat. Remove the hooking device that is holding the boat in place, and get ready to pull it out.
The last thing you need to do is to back the trailer further into the water, and keep going till the boat is floating on its own. Once this happens, pull your trailer back out of the water, and then go on and drive the boat to the dock and tie it up.
Once this is done, drive your car away. Before you ride your boat, just take precautionary measures and check to ensure that everything is operational and that the boat has no leaks in it. Once this is done, feel free to drive your boat around.