航海英語海上通信基本知識單項(xiàng)選擇題每日一練(2019.01.08)

來源：考試資料網(wǎng)

1 Which of the following statements is TRUE regarding automatic identification systems (AIS) ?（）

2 Which of the following statements is TRUE regarding automatic identification systems (AIS) ?（）

3 A yellow signal，floating in the air from a parachute，about 300 feet above the water，indicates that a submarine（）.

4 Which of the following statements is TRUE regarding automatic identification systems (AIS)? （）

5 A message by flashing light consists of the call，the text，the ending，and the（）.