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

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.

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.

Please use（）for（）.

Ship-to-ship distress alerting should be conducted by（）.

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

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

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.

The advantage of geostationary satellites is（）.