单选题What is NOT an advantage of the rhumb line track over a great circle track? （）A Easily plotted on a Mercator chartB Negligible increase in distance on east-west courses near the equatorC Does not require constant course changesD Plots as a straight lin

What is the major advantage of a rhumb line track?

A.The vessel can steam on a constant heading (disregarding wind，current，etc)

B.The rhumb line is the shortest distance between the arrival and departure points

C.It is easily plotted on a gnomonic chart for comparison with a great circle course

D.It approximates a great circle on east-west courses in high latitudes

What is/are the advantage（s）of cranes over conventional cargo booms ________．

A.Cranes are able to pick up and drop loads over a greater spotting area

B.Increased safety because the deck is clear of running and standing rigging

C.Simplicity of operation of the crane by its operator

D.All of the above

A.over an ATM PVC

B.over a FastEthernet bus

C.overa Gigabit Ethernet bus

D.over high speed serial bus

What is an advantage of a gate valve over a butterfly valve ________．

A.Less frequent maintenance

B.Faster operation

C.Cheaper

D.More compact

For what purpose would using a Lambert conformal chart be more convenient than using a Mercator?

A.Plotting radio bearings over a long distance

B.Determining latitude and longitude of a fix

C.Measuring rhumb line distances

D.Measuring rhumb line directions

Centrifugal pumps have what advantage（s）over reciprocating pumps ________．

A.They are less expensive

B.They are smaller for equivalent pumping ability

C.They pump more cargo in less time

D.All of the above

What is NOT an advantage of the rhumb line track over a great circle track?

A.Easily plotted on a Mercator chart

B.Negligible increase in distance on east-west courses near the equator

C.Does not require constant course changes

D.Plots as a straight line on Lambert conformal charts

When landing a lifeboat through heavy surf with a strong current running parallel to the beach（from right to left when facing from seaward）the recommended procedure is to______．

A.approach while coming to the left to take advantage of the current

B.drop an anchor outside the surf line，then pay out anchor line over the bow while the seas carry the boat toward the beach

C.approach slow enough so that the boat can be brought around to meet breaking seas on the bow

D.rig a drogue with tripping line over the bow，back ashore with drogue tripped between breakers