單項(xiàng)選擇題()day,pilot flag should be displayed from main mast.

A.From
B.By
C.on
D.With


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1.單項(xiàng)選擇題The heights and soundings of Admiralty chart are expressed()in Fathoms()in Meters.

A.either,or
B.neither,nor
C.another,nor
D.other,or

2.單項(xiàng)選擇題()is not contained in the NM Weekly.

A.Amendments to Admiralty Sailing Directions
B.Amendments to Admiralty List of Lights and Fog Signals
C.Amendments to Admiralty List of Radio Signals
D.Supplement to Guide to Port Entry

3.單項(xiàng)選擇題()are published for the correction of Admiralty Charts.

A.Admiralty Sailing Directions
B.Admiralty List of Signals
C.Mariner's Handbook
D.Admiralty Notices to Mariners

5.單項(xiàng)選擇題Charts are subject to frequent correction according to ().

A.Notices to Mariners
B.Mariner's handbook
C.Sailing Directions
D.Guide to Port Entry