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.

SOLAS ships shall be equipped with（）.

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

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

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

By using（）system a ship can send a distress message and know with certainty it will be received.

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.

The priority of EGC messages is classified by（）.

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.

（）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.