ATO2 Navy Advancement Exam

ATO2 Navy Advancement Exam What are the two main factors that affect the velocity of sound in seawater? - The temperature and salinity of the water. A sound wave traveling from an area of warm water into an area of cold water will be affected in what way? - It will bend toward the area of cold water. Sonobuoys that transmit an acoustic pulse and detect a resulting echo are classified as what type of sonobuoy? - Active sonobuoys Sonobuoys equipped with an EFS system have what capability? - The capability of selecting channel, life and depth settings What information can a DIFAR sonobuoy provide that a LOFAR sonobuoy cannot? - Submarine bearing. Which of the following sonobuoys provides water temperature data? - BT sonobuoys The OTPI system provides what information to the USW pilot? - Sonobuoy bearing information with respect to aircraft heading. What type of naval aircraft employs the AN/ASQ-13F dipping sonar system? - SH60-F On a dipping sonar system, what component generates and transmits sound energy into the water? - The transducer. What does the acronym IFF stands for? - Identification Friend or Foe What are the three basic steps in the identification process of a typical IFF system? - Challenge, decode, and reply True or False. All naval aircraft contain an interrogator system. - False What is the pulse spacing of Mode 1? - 2.9 to 3.1 microseconds Of the six modes of IFF operation, which one is used by military and civilian aircraft control stations? - Mode 3/A What mode IFF is the military encrypted mode? - Mode 4 What is the transmission frequency of the interrogator? - 1030MHz In a typical IFF/SIF system, what total number of codes can be selected in Mode 2? - 4096 The Identification of Position (I/P) pulse is used for what purpose? - It is used to identify a specific friendly aircraft among other friendly aircraft that reply with the same code. What mode of IFF is set prior to takeoff by maintenance personnel? - Mode 2 Where are Modes 1 and 3/A selected on the AN/APX-72 transponder set? - By thumbwheel switches on the front of the control box. What part of the APX-72 system provides for ground or in-flight transponder testing capability? - The Transponder Test Set TS-1843/APX