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.

（）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.

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

The advantage of geostationary satellites is（）.

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

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

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.

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

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

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