Online testing: Test about Doppler log (CBT)

Select the option, which correctly completes the following statement: “If undisturbed reverberation measurement in shallow water is not possible, the system automatically switches to…”:

Select from the options given six factors, that are likely to affect a Doppler log system:

Which mode is the most suitable to use if the primary function of the connected ARPA is traffic surveillance?

Which one of the following statement depends on the “Janus configuration”?

Which one of the modes given in the options should be used when the Doppler log is connected to an ARPA-radar, which is primarily used for traffic surveillance (according to IMO-rules)?

Which one of the modes given in the options should be used, when the Doppler log is connected to an autopilot with track keeping functions?

Which one of the options identifies when the Doppler log would normally be switched off?

Which one of the options is the most likely reason, that a Doppler log’s operation might be disturbed during docking operations?

Which one of the options is the type of measurement used by the Doppler log?