單項(xiàng)選擇題RYUKYU S TO SE 6 BEC 4-5.ISOL SHWRS.SEA 3 M BEC 2 M.SWELL SE 3-4M.This description is likely to be under the heading of().

A.FORECAST
B.GALE WARNING
C.SYNOPSIS
D.STORM WARNING


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

A.Supplements
B.Annual Summary
C.Navigational Warnings
D.Notices to Mariners

2.單項(xiàng)選擇題On the high seas,a fog signal consisting of one prolonged blast followed by four short blasts would indicate the presence of a().

A.vessel being towed
B.fishing vessel engaged in trawling
C.vessel at anchor warning you of her location
D.power-driven pilot vessel on station underway

3.單項(xiàng)選擇題On the approach of a warm front the barometric pressure usually().

A.falls
B.rises
C.is steady
D.is unreliable

4.單項(xiàng)選擇題On a nautical chart,the inner ring of a compass rose indicates().

A.true directions
B.compass error
C.deviation
D.magnetic directions

5.單項(xiàng)選擇題Navigational warnings are published according to().

A.the designed area
B.the designated area
C.the indicated area
D.all area over the world