单项选择题
The information regarding ports such as buoyed channels,fairway,location and number of terminals,river channels,details of navigational marks,location of overhead bridges, underground cables etc. are shown in（）
A.small-scale charts B.medium-scale charts C.large-scale charts D.natural scale charts
单项选择题 On a weather map,a large letter “h” means（）
单项选择题 There are often three parts in a weather report, not including（）
单项选择题 Which of the following is defined as static information of AIS?（）
