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

Please use（）for（）.

The vessel has stayed in port for seven days because she needs（）.

The advantage of geostationary satellites is（）.

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.

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

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

（）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（）.

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