this is single Anti-Pirate Signal launcher. it complies with SOLAS.
it can make great deterrence to expel pirates.

Anti-Pirate Signal launcher is developed by China National Shipbuilding Equipment & Materials (East China) Co., Ltd., which is initiative in domestic market, and no similar products in international market. A single transmitter unit and four bursts by electric shock are available for customers’ option now. This device is not only safe and reliable but also high accurate, and can be fired in any direction. Parachute signal rocket complied with SOLAS is used as bullet, and can be fired more than 300 meters. Luminous intensity is greater than 30000cd and time longer than 60 seconds. It can make great deterrence to expel pirates. Specific information download address:

http://www.hd-csemc.com.cn/En/DownView.asp?ID=8