 The Type 909 is the second purposely built weapon trial ship in PLAN, and in addition to conducting weapon trials for missiles, guns and rockets, the ship is also tasked to test electronic systems such as radars, communication systems and electronic intelligence and warfare systems.Designed to first supplement and then eventually replace the Yanxi-class weapon trials ship that entered service more than three decades earlier, The Type 909 has received NATO reporting name Wuhu-B class.The design incorporates specially designed accommodations for research crew to carry out their mission.