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

International Navtex service means the coordinated broadcast and automatic reception on（）khz of maritime safety information by narrow-band direct-printing telegraphy using English language.

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

SOLAS ships shall be equipped with（）.

All coast radio stations（）DSC installed for VHF and HF.

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

Monitoring is especially important in a highly automated system which is dependent on careful（）procedure and format.

（）will form the basis for distress alerting and safety calling.

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

Every lifeboat which is fitted with a fixed two-way（）radiotelephone apparatus with an antenna which is separately mounted shall be provided with arrangements for sitting and securing the antenna effectively in its operating position.