（）scale charts are used for harbors.

1、What are two appropriate uses for Inte

What are two appropriate uses for Internet Protocol TV broadcasting (IP/TV) technology? （）A Delivering information about changes in health benef...

2、（）are used for anchor gear in marine w

（）are used for anchor gear in marine work where the chains must withstand the corrosive effects of seawater.AChainsBWiresCRopesDLine

3、When whistle signals are used for laun

When whistle signals are used for launching lifeboats，one short blast means（）.Ause the float-free method onlyBlower all boatsCraise all boatsDdrill is over，secure all boat

4、Isobars on a synoptic chart are useful

Isobars on a synoptic chart are useful in predicting（）.AtemperatureBdew pointCwind velocityDrelative humidity

5、Which nautical charts are intended for

Which nautical charts are intended for coastwise navigation outside of outlying reefs and shoals（）.AApproach chartsBGeneral chartsCSailing chartsDCoast chart

6、（）are used for distress alerting as a

（）are used for distress alerting as a rule.ASES/DSC/EPIRBBSART/radiotelephoneCCOSPAS-SARSATDboth B and C