单项选择题
Class I and II private aids to navigation in or along navigable waters of the United States are listed in the（）.
A.Sailing Directions B.Light List C.List of Private Aids D.Aids to Navigation Manual
单项选择题 Chronometer error may be found by（）.
单项选择题 Charts showing the coast of Mexico are produced by the United States（）.
单项选择题 Chart legends which indicate a conspicuous landmark are printed in（）.
