航海英語航海通告與警告單項選擇題每日一練(2019.01.16)

來源：考試資料網(wǎng)

1 Periodic publications notifying changes in，or additions to，previously published navigational data are（）.

2 The broken magenta line which runs parallel to the shorebetween Roanoke Point and Mattituck Inlet marks a（）.

3 What is the most important source of information to be used in correcting charts and keeping them up to date（）.

4 A steep barometric gradient indicates （）.

5 Chart legends which indicate a conspicuous landmark are printed in（）.