1.入射雷达波与目标表面的夹角（），称为雷达视角

2.In the Northern Hemisphere, if the center of a high pressure area is due west of you, what wind direction would you expect？______.

3.水平气压梯度力与（）

4.船舶在海上转向后，船上罗经会有（）误差。

5.The bow thruster generally is ineffective at ______.

6.在潮汐推算中，如主港3月6日低潮时为2357，低潮时差为+0103，则附港为发生同一低潮应在（）

7.气压观测应在（）

8.南太平洋的西风漂流日流速达10nmile，沿40°～50°S纬度圈流动，属于（）

9.（）：大量微小水滴或冰晶浮游空中，常呈乳白色，使水平能见度小于1km。

10.热带风暴(Tropical Storm，简写（）)。

11.It is dangerous for vessels without the use of radar______the estuary(河口)．

12.In beaufort wind scale，sea state with moderate waves，taking longer form，many whitecaps and some spray，is named as______．

13.象灯塔、教堂尖顶及锥形浮标等这类锥形目标的反射性能很差，只有当雷达波与其母线（），其反射性能才和圆柱形目标相同

14.In the Northern Hemisphere, when the wind at your location is northerly, the low pressure center causing the wind is located to your ______.

15.冷高压(ColdHigh)形成于寒冷的中、高纬度地区，如北半球的格陵兰、加拿大、北极、西伯利亚和蒙古等地，一年四季均有活动，（）最频繁。

16.A pattern according to which vessels and / or aircraft may conduct a co-ordinated search is a ___________.

17.海图数据库包含海图及其他航海出版物的基础数据ENC及其更新数据，它们在系统内形成（）供航海者使用

18.目标的位置(距离和方位)数据在捕获后即可显示，目标的CPA在（）左右(性能标准规定在1min之内)才能显示。

19.My vessel______bad weather with winds reaching force 9 on her way home．

20.PUBLIC ADDRESS SYSTEM:LOUDSPEAKERS IN THE VESSEL’S CABINS, MESS ROOMS, ETC., AND ON DECK VIA WHICH IMPORTANT INFORMATION CAN BE BROADCAST FROM A CENTRAL POINT, MOSTLY FROM THE NAVIGATION BRIDGE defines ______.