Many of the lights on this coast are placed so high as to be frequently obscured by（）.

The international number，location and/or name，geographical co-ordinates，characteristics and intensity，elevation in metres，range in sea miles and description of structure of a light can be found in（）.

A person who sees someone fall overboard should（）.

The program of graphical predictions of height against time for a period of up to seven consecutive days is contained in（）.

Before personnel are lifted from a vessel in a personnel basket，the vessel should be（）.

An orange flag showing a black circle and square is a（）.

The Lists of Meteorological Observation Stations can be found in（）.

A sweep oar is an oar that is（）.

Light Lists for coastal waters are（）.

Mean high water is the average height of（）.