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
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（）.
The numeral in the center of a wind rose circle on a pilot chart indicates the （）.
The maximum difference between mean time and apparent time is （）.
（）is not a position-fixing system.
What defines a great circle? （）
A chart position enclosed by a square is a（n）（）.
The arrangement of charts in the catalogue is（）.
Which information does the outer ring of a compass rose on a nautical chart provide（）.
What is NOT an advantage of the rhumb line track over a great circle track? （）
The soundings on the imperial chart are measured in（）.