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.

On-scene communications will normally take place between（）.

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

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

As each MSI message will have a unique identity, the printing of messages already received correctly is（）.

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

Please use（）for（）.

The rescue coordination center may（）on stations which interfere with traffic.

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

What following is not among the function of SOLAS ships?（）