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.

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.

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

Distress traffic is the communication（）between the station in distress and the ships, aircraft, coast radio stations, coast earth stations and rescue centers participating in the rescue work.

In case a ship is in emergency or distress in any of 4 areas, it is required to use the continuous（）alert.

The advantage of geostationary satellites is（）.

Monitoring is especially important in a highly automated system which is dependent on careful（）procedure and format.

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

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

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