If a GMDSS radio operator initiates a DSC distress transmission but does not insert a message，what happens? （）

A . 6 months B . 1 year C . 2 years D . 3 year

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

A . a low level in the engine expansion tank B . excessively high coolant pressure C . improper temperatures D . malfunctioning of the jacket water heater

A . R1 will forward the packet out all interfaces. B . R1 will drop this packet because this it is not a valid IP address. C . As R1 forwards the frame containing this packet, Sw-A will add 192.168.1.255 to its MAC table. D . R1 will encapsulate the packet in a frame with a destination MAC address of FF-FF-FF-FF-FF-FF E . As R1 forwards the frame containing this packet, Sw-A will forward it to the device assigned the IP address of 192.168.1.255.

A . a distinctive signal B . the Morse Code signal for SOS C . a computerized voice announcement of Mayday D . your vessel's International Radio Call Sig

A . No action is necessary，as the DSC control unit will automatically switch to the NBDP follow-on communications frequency B . The operator should immediately set continuous watch on the radiotelephone frequency that is associated with the frequency band on which the distress alert was received C . The Operator should immediately set continuous watch on VHF channel 70 D . The Operator should immediately set continuous watch on the NBDP frequency that is associated with the frequency band on which the distress alert was received

A . Calling frequency B . Distress frequency C . Urgency frequency D . Working frequency

A . closely observe the pump discharge temperature B . close off the discharge valve, and watch for a rise in pressure C . momentarily close off the suction valve, and watch for a rise in pressure D . use a clamp on ammeter and compare the readings to past record

A . varying the D-Cexciter voltage B . varying the reluctance of the air gap C . regulating the speed of prime mover D . shorting out part of the armature winding

A . Navigational Warnings B . Meteorological Warnings C . Search and Rescue Information D . All of the above

A . At least two years after the last entry B . At least one year after the last entry C . At least 90 days after the last entry D . At least 30 days after the last entry

A . He/she must have an STCW certificate endorsed as“Valid for Service on Vessels Operating in the GMDSS System” B . He/she must present either an FCC-issued license or a Coast Guard-issued license C . You must consult the“List of Qualifications”on the reverse of his/her FCC-issued license D . His/her Merchant Mariners Document must have an added endorsement as “Radio Electronics Officer&rdquo

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 constraint

A . obliged B . obliging C . oblige D . being obliged

A . It will abort the transmission and set off an audible alarm that must be manually reset B . It will initiate the DSC distress alert but，as no information will be transmitted，rescue personnel will not be able to identify the vessel，its position or its situation C . It will initiate the DSC distress alert and default information will automatically be transmitted D . It will initiate the DSC distress alert，but any station receiving it will have to establish contact with the distressed vessel to determine its identity，position and situatio

A . In the Captain's office B . In the sea cabin C . At the GMDSS operating position D . Anywhere on board the vessel

A . pump would be very noisy B . pump would vibrate excessively C . pump would develop insufficient flow D . stuffing box would leak excessively

A.obliged B.obliging C.oblige D.being obliged

A．Lowtransactioncosts. B．Pricesthatrespondrapidlytonewinformation. C．Ratesofreturnthatareproportionaltoriskonaverage.