Areas enclosed by a long and short dashed magenta line indicate （）.

At last，the palm trees that fringe the natural harbor of Port Aloahoa come into view on the horizon lit by the setting sun.The meaning of this sentence is that （）.

During daylight savings time the meridian used for determining the time is located farther （）.

Attention is called to the fact that in many cases pipelines are not （） and charted depths may be decreased by up to 2 meters．

The distance between any two meridians measured along a parallel of latitude and expressed in miles is the （）.

An occulting light is one in which （）.

A pilot vessel on pilotage duty shall show identity lights （）.

Due to lapse of time the risk in these areas to surface navigation is now considered （）than the ordinary risks of navigation，but a very real risk still exists with regard to anchoring，fishing or any form of submarine or seabed activity.

A pilot vessel on pilotage duty at night will show sidelights and a sternlight （）.

The height of tide is the （）.