In Beaufort Scale，the wind force 7 with speed of 28-33 knots

In Beaufort Scale，the wind force 7 with speed of 28-33 knots is defined as ________ ．

A.Moderate gale

B.Near gale

C.Strong gale

D.Whole gale

The numeral in the center of a wind rose circle on a pilot chart indicates the ______.

A.total number of observations

B.average wind force on the Beaufort scale

C.average wind force in knots

D.percentage of calms

The bow thruster generally is ineffective at ______.

A.over 3 knots headway

B.at any speed astern

C.at any speed ahead

D.over 1 knot sternway

An anemometer on a moving vessel measures ______.

A.apparent wind speed only

B.true wind speed and true wind direction

C.true wind speed only

D.apparent wind speed and true wind direction

If the current and wind are in opposite directions，the sea surface represents ______.

A.a greatly reduced wind speed

B.a higher wind speed than what really exists

C.a lower wind speed than what really exists

D.more turbulent winds

CAPE WEST WIND WEST TO SOUTHWEST 15 TO 20 KNOTS WEATHER SHOWERS．This description is likely to be under the heading of ________ ．

A.FORECAST

B.STORM WARNING

C.GENERAL SITUATION

D.MAP ANALYSIS

A fire is discovered in the bow of your vessel while making way. The wind is from ahead at 35 knots. You should ______.

A.remain on course and hold speed

B.remain on course but slack the speed

C.change course to put the wind on either beam and increase speed

D.change course and put the stern to the wind

Gale warnings are usually issued when winds of________8-9are expected.

A.wind Speed

B.Air Force

C.wind Velocity

D.Beaufort Foree

A fire is discovered in the forepeak of a vessel at sea. The wind is from ahead at 35 knots. You should ______.

A.remain on course and hold speed

B.change course and put the stern to the wind

C.change course to put the wind on either beam and increase speed

D.remain on course but slack the speed

Apparent wind speed blowing across a vessel under tow can be measured by a(n)______．

A.barometer

B.wind vane

C.anemometer

D.Thermometer