As each MSI message will have a unique identity, the printing of message that already received correctly is _____________.
A. automatically suppressed
B. finished by the operator
C. manually suppressed
D. done again
查看答案
NAVTEX is a simple, cheap, automated receiver which can be mounted_______________.
A. on the bridge
B. on the deck
C. in the holds
D. in the engine room
What means is used to avoid mutual interference by stations in the NAVTEX system?
A. Stations are limited to daytime operation only.
Both of the following measures are necessary. transmitter power is limited to that necessary for coverage of assigned area and transmissions by stations in each NAVAREA are arranged in a time-sharing basis.
C. Transmitter power is limited to chat necessary for coverage of assigned area.
D. Transmissions by stations in each NAVAREA are arranged in a time-sharing basis.
What is an indication of an out-of paper condition on a NAVTEX receiver?
A. Unit ceases all operation until paper is replaced.
B. Audible and / or visual alarm signal is displayed.
C. External alarm. if fitted, is activated.
D. All of the above.
什么是驻点
A. 函数曲线上满足一阶导数值不存在的点
B. 函数曲线上满足一阶导数值为0的点
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