Radio watchkeeping is automatic with GMDSS. When receiving equipment is activated an operator is alerted. After this, further distress and safety communications are carried out on radio telephone or radio telegraphy (Narrow Band Direct Printing). It should be noted that the previous (specialist) telecommunications officer is now only carried aboard passenger vessels. On all other vessels the watchkeeping deck officers fulfill the functions of communications operator.

When communications are in progress, operators (watchkeeping deck officers) are required to monitor the following:

• That the equipment is in service and fully operational.
• That the equipment is properly set up to perform the mandatory GMDSS functions. This is done by carrying out regular tests according to GMDSS regulations.