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

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

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

Before GMDSS, if the radio officer on board is serious ill,（）.

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.

（）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.

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

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

Please use（）for（）.