Research on Communication Technology for Ocean Fishing Vessels in Distress

: Nowadays, fishing boats are the most vulnerable to danger in the sea. The success rate of rescue after the accident is also lower than the average success rate of national maritime search and rescue. According to incomplete statistics, the direct economic loss of 290,000 marine motor fishing vessels per year is nearly 1 billion yuan. Every year about 600 fishermen die or disappear and more than 1,000 ships sink. According to the statistics of the total number of Chinese Fishing Vessel Owners Mutual Insurance Association in recent 10 years, the Chinese Fishing Vessel Owners Mutual Insurance Association has insured 1.77 million fishing crew members in recent 10 years, with a mortality rate of 2.110 per 100,000 people. Considering other factors, the mortality rate of Chinese marine fishermen can be set at 162 per 100,000 people per year. It is estimated that China has 2 million seafarers and the annual death toll should reach 3235. Fishing vessels in distress at sea are often unable to save themselves. The only way to survive is to call a nearby ship and equip it with communication equipment. However, coastal fishing vessels mainly rely on short-wave or ultra-short-wave intercom equipment for communication. Channels are divided by frequency, and they interfere with each other at the same frequency. Analog technology can only communicate with similar products, but can not connect to public communication networks (such as wired networks, mobile networks). It is imminent to study the communication support technology of ocean fishing vessel in distress.