单项选择题
A.sailing chart B.general chart C.coastal chart D.harbor chart
A chart projection depicting the poles and a small area...
单项选择题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（）.
A.Azimuthal gnomonic projection B.Lambert conformal projection C.Transverse Mercator projection D.Polyconic projection
A chart position enclosed by a square is a（n）（）.A.fixB....
单项选择题A chart position enclosed by a square is a（n）（）.
A.fix B.estimated position C.dead reckoning position D.running fix
（）is not a position-fixing system.A.HifixB.HyperfixC.Tr...
单项选择题（）is not a position-fixing system.
A.Hifix B.Hyperfix C.Trisponder D.WGS84
