Research On Maritime Medium Short Wave Communications Simulator For GMDSS Training

The GMDSS has come into force on 1 February 1999 and has already more than 10 years. For the mean time, there are many students who have been trained in navigation academy, and then they are able to get the GMDSS general operator certification. The training is basic to accord with requirement of the Port State Control (PSC) and ensures safety operation in our country ocean shipping. However, with the development of marine communication and application of new technology, ship full-time radio operators have all been canceled, as the deck officer by the ship. To this end, students of ship navigation need to completely master the professional principles of GMDSS systems and equipment operating, students need to develop professional distress alert and distress communication, emergency calls and emergency communications, safety call and safety communications and general communications skills, in order to ensure navigation safety and smooth communication.The maritime medium short wave communication system is an important communication system of GMDSS, which belongs to the terrestrial communication system. It does not rely on satellites and can be done ship to shore traffic in all sea areas. The medium short wave transceiver is one of necessary equipment on the maritime communication. However, due to the high price of real machine, each of the training institutions to conduct this training hard to do when one person, one machine, effectiveness and quality of training, development of maritime medium short wave communication simulators become an key task of navigation college.The training quality of specialty suit official post in navigation academy concerns maritime navigation safety。The students of navigation profession need the training for the global maritime distress and safety system (GMDSS). The research and development of medium short wave traffic simulator may resolve the problem of training on medium short wave traffic. According to maritime medium short wave traffic principium and traffic program, the developed maritime medium short wave traffic ActiveX control simulate maritime medium short wave transceiver function; Use user datagram protocol (UDP) to broadcast message; Programmed medium short wave transceiver console unit simulator and NBDP simulator and coast station simulator and land telex consumer simulator by VB language; Adopted background sustain and simulating database etc. to simulate all kinds of maritime medium short wave traffic in computer network. The system has no server, so it has the characteristics of maritime medium short wave traffic and conveniences to setup network for training and has better practicability.