At least two two-way VHF radiotelephone apparatus shall be provided on every cargo ship of（）tons gross tonnage and upwards but less than 500 tons gross tonnage.

In case a ship is in emergency or distress in any of 4 areas, it is required to use the continuous（）alert.

Radiotelephony communication or radio telex communication or both will be carried out by terrestrial or satellite means,（）the equipment fitted on ship and the area in which the incident occurs.

Every ship constructed on or after（）shall comply with all the applicable requirements of this chapter.

The frequency（）the safety message will be transmitted shall be included in DSC safety call.

The priority of EGC messages is classified by（）.

Radio communication（）for many years and helps to save tens of thousands of lives.

Radio beacon can be activated（）in case of distress.

SafetyNet is an international service for the broadcast and automatic reception of MSI by means of direct-printing through（）system.

Please use（）for（）.