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

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

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.

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

The advantage of geostationary satellites is（）.

We consider（）send a helicopter with medical facilities to the distress area.

（）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.

Particular care should be（）in selecting CESs in areas where Ocean Regions overlap.

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.

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