7-29. The  horizontal  situation  indicator  gives  what information to the pilot? 1. Direct heading 2. Rate of descent 3. Navigational situation of the aircraft 4. Aircraft attitude 7-30. What   are   the   two   major   uses   of   airborne radios? 1. Communications and detection 2. Communications and navigation 3. Navigation and detection 4. Detection and ranging 7-31. What  rating  normally  maintains  communica- tions and navigational equipment? 1. AC 2. AE 3. AT 4. AW 7-32. What means of radio communications transmits a rapid succession of images (still or moving) over a radio-frequency channel? 1. Radiofacsimile 2. Radioteletype 3. Radiotelephony 4. Radiotelevision 7-33. Long-range airborne communications sets operate in what band of frequencies? 1. From 3 to 30 kilohertz 2. From 3 to 30 megahertz 3. From 30 to 300 megahertz 4. From 30 to 300 kilohertz 7-34. What   is   the   frequency   band   of   short-range VHF/UHF communication sets? 1. 30 megahertz to 3 gigahertz 2. 300 kilohertz to 3 megahertz 3. 30 kilohertz to 300 kilohertz 4. 30 gigahertz to 300 gigahertz 7-35. VHF/UHF    communication    sets    are    called line-of-sight communication sets. 1. True 2. False 7-36. What    is    the    primary    navigational    aid    for carrier-based aircraft? 1. Loran 2. Omega 3. Dead reckoning 4. TACAN 7-37. The   main   advantage   of   GPS   over   LORAN navigation   is   that   GPS   navigation   provides highly    accurate    three-dimensional    position, velocity, and time data. 1. True 2. False 7-38. Which  of  the  following  computations  is  made by navigational computers? 1. Aircraft ground track angle 2. Bearing to target 3. Distance to target 4. Each of the above 7-39. What does Doppler radar measure? 1. Ground speed only 2. Drift angle only 3. Ground speed and drift angle 4. Latitude and longitude 7-40. The inertial navigation system is an automatic aid to navigation that is independent of outside references. 1. True 2. False 7-41. Which  of  the  following  data  does  the  inertial navigational    system    (INS)    provide    to    the overall tactical system? 1. Accurate velocity 2. Attitude 3. Heading data 4. Each of the above 7-42. Upon what principle does radar work? 1. Ranging 2. Detection 3. Echo 4. Radio 7-43. Radio waves travel at what speed? 1. 1,100 feet per second 2. 1,100 miles per hour 3. 186,000 miles per hour 4. 186,000 miles per second 7-44. If it takes 6 seconds for a sound wave to travel to an object and return, what is the distance of the object? 1. 1,100 feet 2. 2,200 feet 3. 3,300 feet 4. 6,600 feet 7-25