REVIEW QUESTIONS

the mode of operation, indicates ground speed and drift angle, and indicates when the system is in the search mode. The signal representing drift angle from the antenna is fed to the servo follow-up in the indicator and positions the DRIFT angle dial to the correct drift angle. The RT develops a voltage proportional to the Figure 2-16.-AN/APN-153(V) components. APN-153(V). B. AS-1350/APN-153(V). APN-153(V). A. RT-680A/ C. C-4418A/ frequency of the frequency generator, which is then fed to a servomotor in the indicator. This servomotor positions the GND SPEED dial to indicate the ground speed. The mode switch should be set to the LAND position when the aircraft is overland, and to the SEA position when over the sea. With the mode switch in the TEST position, you should get the following indications after a 1-minute delay: l l l MEMORY light is off. GND SPEED dial indicates 121±5 knots. DRIFT angle dial indicates 0±2°. The memory light indicates that the audio from both radiated patterns is lost. This means that the system cannot provide accurate information. The two indicators will be locked at the present readings until the RT starts to receive good signals. Q1. Q2. Q3. Q4. Q5. Q6. Q7. Q8. Q9. Q10. Q11. REVIEW QUESTIONS What is the definition of direction? What is the difference in miles between the highest and lowest points of the earth's crust ? What are the imaginary reference lines used to locate points on the earth called? What is the definition of absolute altitude? In the counter-pointer display, how many revolutions does the pointer make per 1,000 feet of altitude? What is the reliable altitude range for the AN/APN-194(V) radar altimeter? How is the barometric switch in the RAWS system reset prior to flight? What are the operating modes of the ADF system? What TACAN operating mode ensures that radio silence is maintained? What are the three operating frequencies used in the omega system? What are the two pieces of data information provided by the AN/APN-153(V) Doppler system? 2-19