An apparatus for cleaning dirty waterlines on yachts, being robotic and self powered, capable of floating on its own, employing a rotating soft scrub brush, able to propel itself to the dirty waterline and once in contact supply sufficient force for cleaning, able to apply soap and water, contains various electronics for remote operation, is remote controlled and capable of being fully automatic with the use of a microcontroller, operated and carried by one person. The materials of the cleaner are corrosion resistant so that it can endure the corrosion-infested environments it will be in. The cleaner also has means of adjusting the cleaning brush so it can reach all areas of the waterline with ease.