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Holy harbor is an SOS-shaped life buoy that can absorbing sunlight in the daytime and give off light at night.Its large light-emitting area makes it far more visible and easier to be found, in order to increase the victims probability of being rescued.
When emergency happens, as soon as the victims press this button,sodium azide (NaN3),ammonium nitrate (NH4NO3),or other materials inside the box will react chemically in no time, liberating a large amount of gas(nitrogen gas or nitrous oxide and water vapor), to shape the SOS.
Luo Shijian, Zhu Shangshang
Xuan Haolin ,Wu Zhengbo , Ni Yanfen ,Tan Guijun