Transas networked GMDSS simulators are high level software products for IBM PC/AT
designed for both, the beginners and experienced sea navigators and radio officers.

TGS-4100 GMDSS simulator provides the instructor with the following capabilities:

• to join the trainees in the training groups where each trainee is assigned parameters (identifiers) of a specific object (some ship or coast radio station);
• to register the trainees, providing for the registration a list of any of the previously compiled groups; to monitor the registration process;
• if required, switch any of the trainees from the group operation mode to the Standalone mode;
• to monitor the "ether" in the process of the exercise conduct, at any of the frequencies used by the trainees, and interfere in their traffic; to introduce noise; 
• to perform functions of a coast telex or phone subscriber, coast radio station and RCC operator; 
• to look through the log of messages transmitted by using the DSC, radio telex, satellite communication systems (INMARSAT-A/B and INMARSAT-C); 
• to set and promptly change the trainee ships' positions by using an electro¬nic chart; 
• to generate exercise scenarios, to use these scenarios during the classes; to interrupt the conduct of an exercise at any time;
• at any time after the end of work with a group, to view the exercise log containing the list of messages transmitted by using the DSC, radio telex, satellite communication systems (INMARSAT-A/B and INMARSAT-C), as well as some of the trainee actions; to print out the exercise log; 
• to edit the database on objects (ships or coast radio stations) and use it in the compiling of new groups and scenarios;
• to monitor the operator procedures at any workplace on the real time scale; use the status window of all the instruments at any workplace.