单选题Which statement is FALSE concerning a tagline as used with a 30-ton pedestal crane（）.A Taglines are wire rope purchases that raise and lower the jibB Taglines are wire ropes for horizontal positioning of the rider blockC Taglines can be fastened to cor

Which statement is FALSE concerning a tagline as used with a 30-ton pedestal crane ________．

A.Taglines are wire rope purchases that raise and lower the jib

B.Taglines are wire ropes for horizontal positioning of the rider block

C.Taglines can be fastened to corners of vehicles or containers

D.The crane might not have taglines installed in its rigging system

Which statement is TRUE concerning inert gas systems on tankers ________．

A.Flue gases from the ship's boilers are used in some systems

B.The gas is helium

C.Using the system accelerates the rusting of the tanks

D.All of the above

Which statement is TRUE concerning equatorial tides ________．

A.They occur when the Sun is at minimum declination north or south

B.They occur when the Moon is at maximum declination north or south

C.The difference in height between consecutive high or low tides is at a minimum

D.They are used as the basis for the vulgar establishment of the port

Which statement concerning the application of dry chemical powder is FALSE ________．

A.At temperatures of less than 32℉，the extinguisher must be recharged more often

B.When possible，the fire should be attacked from windward

C.The stream should be directed at the base of the fire

D.Directing the stream into burning flammable liquid may cause splashing

Which statement concerning GPS is TRUE ________．

A.It cannot be used in all parts of the world

B.There are 12 functioning GPS satellites at present

C.It may be suspended without warning

D.Two position lines are used to give a 2D fix

Which statement is TRUE concerning buoyant work vests aboard tankers ________．

A.They may be worn while working on deck but not while working over the side

B.They must be used only under supervision of a designated ship's officer

C.They will be accepted for up to 10% of the required life preservers

D.They may be worn during drills

Which statement about the gyrocompass is FALSE ________．

A.Its accuracy remains the same at all latitudes

B.It seeks the true meridian

C.It can be used near the Earth's magnetic poles

D.If an error exists，it is the same on all headings

Which statement concerning carbon dioxide is FALSE ________．

A.It displaces the oxygen in the air

B.It cannot be seen

C.It cannot be smelled

D.It is safe to use near personnel in a confined space

Which statement concerning locating signals in the GMDSS is FALSE ________．

A.Locating signals are transmitted by survival craft VHF transceivers

B.Locating signals are transmitted by SARTs

C.Locating signals are intended to facilitate the finding of a distressed vessel or its survivors

D.Locating signals are not transmitted by autoalarm generators

You are underway with a tow consisting of six barges containing hazardous chemicals．Which statement is FALSE concerning a cargo information card ________．

A.It must be carried in the pilothouse，readily available for each chemical carried

B.It must be posted on the lead barge of the tow only

C.It must be posted on each barge on the tow

D.It contains information on procedure for spills or leaks