You are about to go to sea and adjust the magnetic compass．To expedite the adjustment at s

It is dangerous for vessels without the use of radar ______ the estuary．

A.To get

B.To approach

C.To proceed

D.To close

broadcast every 1 to 10 seconds ________．

A.Rate of turn

B.Latitude and longitude

C.Navigational status

D.All of the above

broadcast every 1 to 10 seconds ________．

A.Call sign and IMO number

B.Course over ground and MMSI

C.MMSI number and call sign

D.Route Plan and navigational status

s the wrecks located to the NW and SW of your 2215 position ________．

A.A decreasing reading on loran pair 9960-X

B.The bearing of Wolf Trap Light changing to the right

C.Increasing soundings

D.The bearing of Wolf Trap Light changing to the left

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 one of the followings does not limit the effective range of radar ________．

A.Pulse width

B.Pulse repetition frequency

C.Peak power

D.Target brightness

The loran lines drawn on navigation charts represent ______．

A.Ground waves

B.Skywaves

C.Either ground waves or skywaves interchangeably

D.An average between ground wave and skywave positions

_______．

A.AIS cannot be used to make passing arrangements because the system is not capable of this type of ship-to-ship communications

B.AIS cannot be used to make passing arrangements because the ship-to-ship text messaging feature is for emergency use only

C.AIS can be used to make passing arrangements via ship-to-ship text messaging but a vessel operator is not relieved from the requirement to sound whistle signals or make arrangements via bridge-to-bridge radiotelephone

D.AIS can be used to make passing arrangements via ship-to-ship text massaging thus relieving a vessel operator from making such arrangements via bridge-to-bridge radiotelephone or signaling intent to pass via whistle signals

the exact ranges of other ships or objects in the vicinity．

A.Radar

B.GPS

C.DF

D.Satellite Navigator

n OSV ________．

A.Immediately

B.After one hour

C.Only when another vessel is in sight

D.Only after sunset