Ship-to-ship distress alerting should be conducted by（）.

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

Before GMDSS, if the radio officer on board is serious ill,（）.

Stations in the United States of America are grouped by states arranged in the alphabetical order of their（）.

For COSPAS-SARSAT system,（）usually transmit initial COSPAS-SARSAT alert.

Can MF/HF radiotelephone receive the MSI sent from the coast stations alone?（）

（）by an ice-breaker, it is important to maintain a continuous listening watch on the appropriate VHF channel and to maintain a proper look-out for sound and visual signals.

COSPAS-SARSAT is intended to be used for（）.

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

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