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

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.

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

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

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

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

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

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.

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

The quality of EGC messages is（）affected by the position of the ship, the time of reception and climatic conditions.