In which of the following situations is the FMC present position of a B737-400 Electronic Flight Instrument System likely to be least accurate?

1) In which screen modes of an Electronic Horizontal Situation Indicator (EHSI) on a B737-400 will radar returns not be shown?

2) How does the Electronic Flight Instrument System display of a B737-400 respond to the failure of a VHF navigation (VOR) receiver?

3) Which component of the B737-400 Electronic Flight Instrument System generates the visual displays on the EADI and EHSI?

4) In which of the following situations is the FMC present position of a B737-400 Electronic Flight Instrument System likely to be least accurate?

5) Which component of the B737-400 Flight Management System (FMS) is used to enter flight plan routeing and performance parameters?