更多"Which statement about radio navigat"的相关试题:
[单项选择]He went ahead（）all warnings about the danger of his mission.
A. in case of
B. in place of
C. in spite of
D. regardless of
[单项选择]The principal advantage of NAVTEX radio warnings is that（）.
A. they can be used by mariners who do not know Morse code
B. only an ordinary FM radio is necessary to receive these warnings
C. information on a given topic is only broadcast at specified times
D. they cover a broad spectrum of the radio band allowing reception on almost any type of receiver
[单项选择]Which statement concerning GMDSS Radio Operator requirements is FALSE（）.
A. Each compulsory vessel must carry at least two licensed GMDSS Radio Operators at all times while at sea
B. Each compulsory vessel must carry at least two licensed Radio Operators at all times while at sea and may elect to carry a GMDSS Radio Maintainer as well
C. Communications involving safety of life at sea do not have to be logged as long as the compulsory vessel was not involved in such communications
D. While at sea，adjustments to，and the maintaining of，GMDSS equipment may be performed by the GMDSS Radio operator as long as the work is supervised by an onboard licensed GMDSS Radio Maintainer
[单项选择]Which statement about transmitting distress messages by radiotelephone is INCORRECT?（）
A. Distress messages should first be transmitted on 2182 kHz
B. It is advisable to follow a distress message on 2182 kHz by two dashes of 10 to 15 seconds duration
C. If no answer is received on the designated distress frequencies，repeat the distress call on any frequency available
D. Channel 16 (156.8 MHz) may be used for distress messages
[单项选择]Which statement about satellite navigation is TRUE? （）
A. While a fix can be generated by signals received from two satellites，three satellites are necessary for reliable accuracy
B. The satellites are in equatorial orbits around the earth about 60°of longitude apart
C. The satellite navigation system determines a fix by measuring the doppler shift of the radio signals from the satellite
D. The ship's receiver cannot begin processing data until the antenna locks onto the satellite and starts continuous tracking
[单项选择]Which statement about diesel engine combustion is true?（）
A. Combustion does not begin until the piston starts down on the power stroke
B. Maximum combustion pressure is reached before TDC
C. Turbulence in the cylinder causes a delay in ignition
D. Maximum cylinder firing pressure is not developed until the piston passes TDC
[单项选择]Which maintenance functions can a GMDSS Radio Operator perform（）.
A. The Operator can make fine internal adjustments to the transmitter as long as the output power does not change by more than one percent
B. The Operator is responsible for ensuring that INMARSAT antennas are free of built-up soot and clear of obstacles
C. All levels of maintenance must be performed by a licensed GMDSS Radio Maintainer
D. The Operator may install an EPROM in order to ensure that the equipment continues to operate within legal constraints
[单项选择]Which statement about access lists that are applied to an interface is true?（）
A. you can apply multiple access lists with the same protocol or in different direction.
B. you can config one access list,per direction,per layer 3 protocol
C. you can place as many access lists as you want on any interface
D. you can apply only one access list on any interface
[单项选择]Which statement about the Navigation Rules is TRUE?（）.
A. The rules require vessels to comply with Traffic Separation Scheme regulations
B. The rules use the term safe speed
C. The Rules permit a stand-on vessel to take action prior to being in extremis
D. All of the above are correct
[单项选择]Which statement about an estimated position is TRUE?（）
A. It is more reliable than a fix based on radar bearings
B. It may be based on a single LOP or questionable data
C. When a 3-LOP fix plots in a triangle，the center of the triangle is the estimated position
D. It is usually based on soundings
[单项选择]Which statement about the hospital space on a cargo ship is TRUE（）.
A. The hospital may be used for disciplinary confinement if it is not being used for treatment
B. The hospital space must have both a bathtub and shower
C. A hospital is required on all vessels with a crew of 12 or more if it makes overnight voyages
D. If a ship has a crew of forty-five who do not have their own room，the hospital must have four berths
[单项选择]Which statement about the Flinders bar of the magnetic compass is CORRECT（）.
A. It compensates for the error caused by the vertical component of the Earth's magnetic field
B. It compensates for error caused by the heeling of a vessel
C. It compensates for quadrantal deviation
D. It is only needed in equatorial waters
[单项选择]You are on a containership. Which statement about the stowage of hazardous materials in containers is TRUE?（）.
A. The containers provide automatic segregation of hazardous materials except for class A explosives
B. All packages within a container must be marked This End Up to indicate the correct stowage
C. A refrigerated container with a fuel tank containing a flammable liquid must be stowed on deck
D. Packages of liquids within a container should be stowed on top of packages of solids to prevent crushing
[单项选择]Which statement about firefighting foam is TRUE?（）
A. Foam conducts electricity
B. To be most effective，foam should be directed at the base of the fire
C. Foam is most effective on burning liquids which are flowing
D. Foam can ONLY be used to extinguish class A fires
[单项选择]Which statement about immersion suits is TRUE?（）
A. The primary color of the suit's exterior may be red，orange or yellow
B. The suit must，without assistance，turn an unconscious person's mouth clear of the water within 5 seconds
C. The suit is flameproof and provides protection to a wearer swimming in burning oil
D. The suit may be stored in a machinery space where the ambient temperature is 160°F
[单项选择]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
[单项选择]Which statement about stowing spare hose is TRUE（）.
A. Fold the hose so that the male coupling is about 4 feet from the female coupling，then roll it up
B. Roll the hose starting at the female end
C. Roll the hose starting at the male end
D. Fold the hose into lengths about 6 feet long and then lash the folds together
[单项选择]Which statement about stopping a vessel is TRUE?（）
A. A lightly laden vessel requires as much stopping distance as a fully laden vessel when the current is from astern
B. A vessel is dead in the water when the back wash from astern operation reaches the bow
C. A tunnel bow thruster can be used in an emergency to reduce the stopping distance
D. When a vessel is dead in the water any speed displayed by doppler log reflects the current
