Development of Smart Lifesaver System for Sea divers through Underwater Communication - A Review

The submerged remote sensor network is a quick developing space of examination as it screens and gathers information for different applications such as military, industry, contamination checking, oil control and upkeep, seaward investigations, environmental change observing, and oceanography research. Water information correspondence is a possible innovation to acknowledge submerged correspondence. Because the submerged sensors and the people on the surface use different innovations that mostly work in their own mediums, they can't communicate information. In comparison to radio signals that go via air, radio transmissions that travel through water travel much faster. Submerged gadgets' acoustic or sonar signals, for the most part, reflect off the surface and never get through. This is a great challenge in many of the applications such as sea exploration and water to land communication. The climatic conditions under the ocean will be evolving immensely. It influences Sea divers in a problem. It is hard to screen the ailments of ocean Sea divers subsequent to dropping; heart beat turns out to be wildly evolving. So regardless of whether his pulse lows dangerously it might prompt demise. What's more, there is no plan to save Sea divers in those conditions. Here the water can act as an information sending mechanism for correspondence between submerged Sea divers to land. Hence, the proposed system framework collects biological parameters of sea divers to screen health states by using temperature, heart beat and breathe sensors along with pressure and depth sensor. The collected data is compared with threshold value in the Arduino uno, and if it exceeds the threshold value the captured data would be transmitted to the receiving station which is kept at the sea shore control room by using frequency conducting ball between the water channel of different Transmitter and Receiver segment. The acoustic communication is used in the water channel with BPSK modulation scheme. It delivers the sea diver's health conditions and communications for the immediate action to be taken by checking end accessible at the sea shore control room. Also, an alert signal would be generated to rescue the person who is under danger.