A.total number of observations
B.average wind force on the Beaufort scale
C.average wind force in knots
D.percentage of calms
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A.equal to the longitude expressed in time units
B.about 16 minutes
C.the difference between the GHA of mean sun and the first point of Aries
D.15°of arc
A.radar conspicuous beacon
B.circular radiobeacon
C.radar transponder beacon
D.radar calibration beacon
A.deviation
B.annual rate of variation change
C.precession
D.compass error
A.newly edition with up to date correction and in reasonable prices
B.the current edition and incorporate the last Notices to Mariners correction
C.the current edition and incorporate the latest Notices to Mariners correction at the time of sale
D.brand-new one with up to date correction and clean writing
A.C
B.Cl
C.Co
D.c
最新試題
The numeral in the center of a wind rose circle on a pilot chart indicates the （）.
The broken magenta lines（long and short dashes）in and around Mobjack Bay indicate（）.
What is NOT an advantage of the rhumb line track over a great circle track? （）
On chart，bearings to near objects should be used in preference to objects farther off，because（）.
The survey information upon which a chart is based is found （）.
The shoreline on charts generally represents the mean（）.
Charts showing the coast of Mexico are produced by the United States（）.
Which aid is NOT marked on a chart with a magenta circle? （）
A chart projection depicting the poles and a small area on either side of a connecting meridian，that is sometimes used for star charts，is the（）.
Which information is found in the chart title（）.