航海英語GMDSS單項選擇題每日一練(2019.01.11)

來源：考試資料網(wǎng)

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

2 （）process the distress signal from EPIRB to determine its position and identity.

3 How long must the GMDSS radio log be retained on board（）.

4 After successful commissioning, the（）will permit the SES access to system.

5 A sailor on board（）from appendicitis and required operation immediately.